# Breathing And Exchange Of Gases Questions

We provide breathing and exchange of gases practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on breathing and exchange of gases skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.

#### List of breathing and exchange of gases Questions

Question NoQuestionsClass
1Hyperventilation is
A. Extra deep breathing
B. Rapid breathing
C . Rapid shallow breathing
D. Rapid deep breathing
11
2Complete the following sentence by selecting the correct option. The breathing rhythm is generated in the ( _{–}(i)_{–} ) and is influenced by variation in levels of ( _{–}left(text {ii) }_{—} ) in the right.
blood.
A. (i)medulla ( left(text { ii) } C O_{2}right. )
B . (i)medulla ( left(text { ii) } O_{2}right. )
c. (i)frontal lobe
(ii) ( C O_{2} ) and ( O_{2} )
D. (i)frontal lobe
(ii) ( C O_{2} )
11
3After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to
A. Inspiratory Reserve Volume (IRV) + Expiratory Reserve Volume (ERV) + Tidal Volume (TV) + Residual Volume ( (R V) )
B. IRV + RV + ERV
C. ( operatorname{IRV}+mathrm{TV}+mathrm{ERV} )
D. TV + RV + ERV
11
4Which of the following statements is
not correct?
A. Taking in of oxygen is inhalation.
B. Taking in of carbon dioxide is inhalation
C. Breathing rate is number of inhalation and exhalation in one minute.
D. Giving out of carbon dioxide is exhalation.
11
5How much oxygen is delivered by 100 ( mathrm{ml} ) of oxygenated blood to the tissues under normal physiological conditions?
( mathbf{A} cdot 15 mathrm{m} )
B. ( 10 mathrm{ml} )
( c .5 mathrm{m} )
D. 2.5 m
11
6Which of the following match is correct?
A. Emphysema – Reduction of surface area of alveoli and bronchi.
B. Pneumonia – Occupational disease with asbestos.
C. Silicosis – Inflammation of alveoli.
D. Asthma – Excessive secretion of bronchial mucus.
11
742. Just born baby has the respira-
tory rate as
(1) 32 times/minute
(2) 26 times/minute
(3) 18 times/minute
(4) 15 times/minute
11
8A person suffering from frequent episodes of nasal discharge, nasal
congestion, reddening of eyes and watery eyes. These are the symptoms of
A. Cyanosis
B. Bronchitis
c. Rhinitiss
D. Bronchial carcinoma
11
9At higher altitudes, the air becomes rarer and amount of oxygen per liter of air decreases.

Increase in all of the following would
compensate this decrease for performing normal biological functions
of our body, except
A. The concentration of haemoglobin
B. The number of red blood cells
c. The temperature of the body
D. The rate of breathing

11
10The major fraction of ( C O_{2} ) released
during cellular respiration is transported by the blood to the lung capillaries
A. In combination with haemoglobin
B. As free ( C O_{2} )
c. As carbonic acid or ( H_{2} C O_{3} )
D. In the form of bicarbonate ions
11
11The given figure illustrates the changes in lung volume during the process of breathing.The change from II to III
indicates the
A. movement of diaphragm away from the lungs
B. expansion of the thoracic cavity
c. movement of air out of the lungs
D. expansion of ribs.
11
12Under a given concentration in blood, dissociation of oxyhaemoglobin will increase if
A. pH of blood falls
B. pH of blood rises
c. ( C O_{2} ) concentration in blood falls.
D. Free fatty acid concentration in blood falls
11
13Distinguish between IRV and ERV.11
14Which of the following is a respiratory disease?
A. Polio
B. Arithritis
c. Asthma
D. cancer
11
15A person is suffering from frequent episodes of nasal discharge, nasal congestion, reddening of eyes and
watery eyes. These are the symptoms of
A. Cyanosis
B. Bronchitis
c. Rhinitis
D. Bronchial carcinoma
11
16Assertion
The lungs are situated in thoracic chamber which is anatomically an airtight chamber.
Reason
Such an arrangement is essential to avoid any change in pulmonary volume.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
17Which of the following is an occupational respiratory disease
A. A)diptheria
B. B) pneumonia
c. ( mathrm{c} ) tuberculosis
D. D) asbestosis
11
18What is the breath rate in human
beings?
11
19( mathrm{CO}_{2} ) is carried in blood by hemoglobin in the form of
A. Sodium bicarbonate
B. Potassium bicarbonate
c. Carbamino compound
D. Methaemoglobin
11
20Distinguish between vital capacity and total lung capacity.11
21Alveoli increase the surface area of the
human lung which is approximately the size of a:
A. tennis court
B. dining table
c. dinner plate
D. small bowl
11
22If expiratory reserve volume is ( 1100 mathrm{ml} ) residual volume is ( 1200 mathrm{ml} ) and tidal
volume is ( 500 mathrm{ml} ), what shall be the
functional residual capacity?
A . ( 1600 mathrm{ml} )
B. 2800 m!
c. ( 2300 mathrm{ml} )
D. ( 1200 mathrm{ml} )
11
23How much percentage of oxygen is expired?
A . ( 7 % )
B. 25%
c. ( 15 % )
D. ( 20 % )
11
24If ( P_{a t m}=0 mathrm{mm} mathrm{Hg} ) and ( P_{a l v}=-2 mathrm{mm} mathrm{Hg} )
then
A. it is the end of the normal inspiration and there is no airflow
B. it is the end of the normal expiration and there is no airflow
C. transpulmonary pressure ( left(P_{t p}right) ) is ( -2 mathrm{mm} ) Hg
D. air is flowing into the lungs
11
25Which of the following activities is characterised by minimum breathing
rate?
A. Sleeping
B. Washing of clothes
c. Cleaning of floor
D. Dancing
11
26( C O_{2} ) is transported as
A. Dissolved in blood plasma
B. Carbonic acid
C. Carbaminohaemoglobin
D. Carbaminohaemoglobin, carbonic acid and dissolved in plasma
11
27Give the differences between right and left lungs of humans.11
28Oxygen haemoglobin dissociation curve will shift to right on decrease of
A. Acidity
B. Carbon dioxide concentration
c. Both A and B
D. ph
11
29Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of
A. Expiratory Reserve Volume
B. Residual Volume
c. Inspiratory Reserve Volume
D. Tidal Volume
11
30During inspiration, the diaphragm
A. Expands
B. Shows no change
c. contracts and flattens
D. Relaxed to become dome shaped
11
31In blood, ( mathrm{CO}_{2} ) in transported majorly as
A. Sodium carbonate
B. Carboxyhaemoglobin
c. Bicarbonate
D. ( mathrm{cO}_{2} ) as such
11
32Which one of the following is an example of buffer system in blood?
A. Haemoglobin and oxyhaemoglobin
B. Oxygen and carbon dioxide
c. Albumin and globulin
D. Sodium bicarbonate and carbonic acid
11
33Hyperventilation or hyperpnoea causes
A. Increased carbon dioxide concentration of blood
B. Decreased blood carbon dioxide concentration
C. Temporary stoppage of respiration
D. Both B and C
11
34Oxygen in lungs ultimately reaches
A. Alveoli
B. Trachea
c. Bronchus
D. Bronchioles
11
35During inspiration muscles of diaphragm
A. Contracts
B. Expands
c. No effect
D. Coiled like string
11
36Assertion
Emphysema is the permanent abnormal inflation of air space of
terminal bronchioles or alveolar sacs.
Reason
Destruction of pulmonary tissues specially alveolar septa and flattening of alveolar ducts occur in emphysema.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
37With reference to human respiration,
which is correct?
A. Pulmonary ventilation is equal to alveolar ventilation.
B. Alveolar ventilation is less than pulmonary ventilation.
C. Alveolar ventilation is more than pulmonary ventilation
D. Pulmonary ventilation is less than alveolar ventilation.
11
38What is oxygen dissociation curve? List the factors which result in causing this
curve
11
39In which of the following disease, alveoli are deprived of oxygen due to flattening of tracheal vessels?
A. Bronchitis
B. Asthma
c. Pneumonia
D. Emphysema
11
40Vital capacity of human lung for air
( A cdot 4000 m )
B. 1500 ( mathrm{m} ) ।
( c cdot 1000 m )
D. 500 m1
11
41Many persons like to use asthma as an excuse for not being able to do well in
sports. Try telling them about Down Fraser, who was the first women to break 60 sec in 100 m freestyle swimming. The first women to win four Olympic gold medals and the first swimmer to win the same event in three
consecutive Olympics was asthmatic. On the basis of the above passage,
¡) Mention the qualities, which might have helped her to win medals at three Olympics consecutively.
11
42Cyanosis is
A. Lack of oxygen in body fluids.
B. Difficult or heavy breathing.
C. Excess of carbon dixode in the body fluids.
D. Skin turning blue due to excessive amount of deoxygenated haemoglobin in the skin blood vessels.
11
43Lungs in the thoracic cavity is seperated form the abdominal cavity by means of
A. Peritonium
B. Pleura
c. Trechea
D. Diaphragummumumnnmmm
11
44In breathing movements, air volume can be estimated by
A. stethoscope
B. hygrometer
c. sphygmomanometer
D. spirometer
11
45is the respiratory pigment which
carry oxygen in the blood.
A. Myoglobin
B. Bilirubin
c. Biliverdin
D. Haemoglobin
11
46The protein ( alpha-1 ) antitrypsin is used to
treat which of the following disease?
A. Cancer
B. Rhematoid arthritiss
c. Emphysema
D. ADA deficiency disease in children
11
47The resting tidal volume to vital capacity ratio should be
A . 1: 5
B. 1:10
c. 1: 20
D. 1: 40
11
48Respiratory disease associated with excess histamine is
A. Bronchitis
B. Emphysema
c. Asthma
D. All of the above
11
49The act of breathing out air from the lungs is called as
A. Absorption
B. Exhalation
c. Excretion
D. Inhalation
11
50In alveolar air, the partial pressure of
( C O_{2} ) is
A. ( 40 mathrm{mm} ) of ( mathrm{Hg} )
B. ( 42 mathrm{mm} ) of ( mathrm{Hg} )
c. ( 44 mathrm{mm} ) of ( mathrm{Hg} )
D. ( 46 mathrm{mm} ) of ( mathrm{Hg} )
11
51With regard to the respiratory system and the process of respiration in man, answer the following questions:
What is meant by:
11
52Occupational lung diseases that occurs in humans, among those given below is
A. Dyspnea
B. Anthracosis
c. Atelectasis
D. Cyanosis
11
53Carbon dioxide entering erythrocytes reacts with water to form carbonic acid.
The enzyme catalyzing this
A. Carbonic anhydrase
B. Carboxypeptidase
c. Hydrolase
D. oxidoreductase
11
54Assertion
Most of the premature babies suffer
from Respiratory distress syndrome
Reason
Lecithin (surfactant) is secreted on the
inner side of the alveoli and prevent
collapsing of aveolar wall
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
55Name the body structure concerned
with the given functional activity. Provides actual diffusion of respiratory gases in lungs.
11
56Carbon dioxide is transported via blood to lungs mostly
A. As carbaminohaemoglobin and as carbonic acid
B. In the form of carbonic acid only.
c. In combination with haemoglobin only.
D. Dissolved in blood plasma
11
57Which of the following bone structures protect the lungs in our body?
A. Rib cage
B. Skull
c. vertebral column
D. All of the above
11
58The inferior part of the nasal septum is formed by the
A. Incus
B. Vomer
c. stapes
D. All of the above
11
59State one function of the following. Intercostal muscles.11
60Carotid artery supplies
A. Oxygenated blood to lungs
B. Oxygenated blood to intestine
C. Oxygenated blood to brain
D. None of these
11
61Passage of air through the respiratory tract during inspiration is
A. Nostril – Nasal cavity – Larynx – Pharynx – Bronchi Trachea – Bronchioles – Alveoli
B. Nostril – Nasal cavity – Pharynx – Larynx – Trachea Bronchi -Bronchioles – Alveoli
C. Nostril – Nasal cavity – Larynx – Pharynx – Trachea Bronchi -Bronchioles – Alveoli
D. Nostril – Nasal cavity – Bronchioles – Bronchi – Larynx Pharynx – Trachea – Alveoli
11
62When diaphragm of man is completely
dome shaped, it shows
A. End of expiration and beginning of inspiration
B. Beginning of expiration and end of inspiration
C. Increased rate of breathing
D. Decreased rate of breathing
11
63STRUCTURED/APPLICATION/SKILL TYPE
The volume of air in the lungs and the rate at which it is exchanged
during inspiration and expiration was measured.

The following diagram shows a group of lung volumes and capacities. Study the diagram carefully and explain briefly the following:
nspiratory reserve volume

11
64Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is
A. Inefficient system of ventilation with litle of residual air
B. Inefficient system of ventilation with high percentage of residual air
c. An efficient system of ventilation with no residual air
D. An efficient system of ventilation with little residual air
11
65Increase in body temperature makes oxygen haemoglobin curve to shift?
A. Right
B. Left
c. central
D. None of these
11
66The RBC transports ( mathrm{CO}_{2} ) in the form of
A. Bicarbonate ions
B. Carbonic acid.
c. oxyhaemoglobin.
D. Carboxyhaemoglobin.
11
6732. What does “Corpus luteum” se.
crete ?
(1) Progesterone
(2) Testosterone
(3) Estrogen
(4) Haemoglobin
11
68Which of the following structures are responsible for breathing process?
A. The trachea and alveol
B. Larynx and bronchi
c. Ribs and intercostal muscles
D. Intercostal muscles and diaphragm
11
69If there is deficiency of surfactant the disease is
A. Emphysema
B. Respiratory distress syndrome
c. Bronchitis
D. All of the above
11
70The air we breathe out contains more
A. Oxygen
B. Carbon dioxide
c. water
D. chlorophyll
11
71A person met with an accident and died instantaneously without any injury to heart, brain, stomach or kidney, which
one of the following must be the reason?
A. Diaphragm got punctured
B. Stomach stopped digestion
c. Intestine got twisted
D. RBC’s got coagulated
11
72Total lung capacity is
A. 1 llit
B. 3 litt
c. 6 lit
D. 8 litt
11
73The combination of haemoglobin with
oxygen in blood can be promoted by:
A. increasing oxygen concentration in the blood
B. increasing carbon dioxide concentration in the blood
C. decreasing oxygen concentration in the blood
D. increasing carbon monoxide concentration in the blood
11
74Differentiate between.
Vital capacity and total lung capacity
11
75Differentiate between
external respiration and internal
respiration.
11
76What is respiration? Explain the process of respiration in human beings. (Figure not required)11
77The protein alpha-1 antitrypsin is used to treat the disease
A. Cancer
B. Rheumatoid arthritis
c. Alzheimer’s disease
D. Emphysema
E. ADA deficiency disease in children
11
78The volume of anatomical dead space
air is normally
A. 230 ( mathrm{ml} )
B. 210 m1
c. ( 190 mathrm{ml} )
D. 150 ( mathrm{m} )
11
79Assertion
Alveoli are the primary sites for
exchange of gases.
Reason
All factors in our body are favourable for
the diffusion of ( O_{2} ) from alveoli to
tissues and that of ( mathrm{CO}_{2} ) from tissues to
alveoli.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
80Given that tidal volume is ( 600 mathrm{ml} ) inspiratory reserve volume is ( 2500 mathrm{ml} ) and expiratory reserve volume is ( 800 mathrm{ml} )
what is the value of vital capacity of lung?
A . ( 3900 mathrm{ml} )
B. 3300ml
( c .3100 mathrm{ml} )
D. ( 1400 mathrm{ml} )
11
81Lack of pulmonary surfactant produces
A. Asthma
B. Emphysema
c. cystic fibrosis
D. Respiratory distress syndrome
11
different oxygen pressures.
The greatest difference in oxygen
saturation between hemoglobin and
myoglobin takes place at which of the
following pressure?
partial pressure
Myoglobin
( A cdot 1 k P a )
в. ( 2 k P a )
( c .3 k P a )
D. ( 4 k P a )
( E )
11
83Read the given statements and select
the correct option.

Statement 1: About 70% of ( C O_{2} ) that
enters RBCs changes into. ( boldsymbol{H} boldsymbol{C O}_{3} ) for transport in plasma to the lungs where
it reconverts into ( C O_{2} ) for elimination.
Statement 2: About ( 40 % ) of ( C O_{2} ) that
enters RBCs changes into carbaminohaemoglobin which releases
( O_{2} ) in the lungs.
A. Both statements 1 and 2 are correct.
B. Statement 1 is correct but statement 2 is incorrect
c. Statement 1 is incorrect but statement 2 is correct
D. Both statements1 and 2 are incorrect.

11
84Which row in the table shows the
correct percentage of oxygen in atmospheric and exhalend air?
begin{tabular}{lll}
& Atmospheric air ( / % ) & Exhaled air ( / % ) \
( mathrm{A} ) & 78 & 21 \
( mathrm{B} ) & 21 & 16 \
( mathrm{c} ) & 16 & 4 \
( mathrm{D} ) & 4 & 0.04 \
hline
end{tabular}
11
85The protein ( alpha 1- ) antitrypsin is used to treat the disease.
A. Cancer
B. Rheumatoid arthritis
c. Alzhelmer’s disease
D. Emphysema
11
86Upward and downward movement of diaphragm occur consecutively. Why?11
87Assertion
Oxyhaemoglobin dissociates near the organ tissue due to Bohr effect and
oxygen is released.
Reason
Increased ( mathrm{CO}_{2} ) concentration reduces
the affinity of haemoglobin for oxygen.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
88At the time of expiration, diaphragm
becomes
A. oblique
B. Normal
c. Flattened
D. Dome-shaped
11
89Explain the terms: Vital capacity of lungs in terms of IRV (Inspiratory Reserve Volume), ERV (Expiratory Reserve Volume), TV (Tidal Volume) and
RV (Residual Volume)
11
90Which of the following maintains the volume of air in the chest cavity during breathing?
A. Diaphragm
B. Lungs
c. Breastbone
D. None of the above
11
91What is the effect of ( p C O_{2} ) on oxygen
transport?
11
92Percentage of ( 0_{2} ) present in inhaled air in man is about
A . 21%
B. 78%
c. 1%
D. 43%
11
93How much amount of volume of air is in
lungs as FRC?
A. ( 1500 mathrm{ml} ) to ( 1600 mathrm{ml} )
B. 2100 m| to 2500 m1
c. 2500 ( mathrm{ml} ) । to ( 3000 mathrm{ml} )
D. 1600 ( mathrm{ml} ) to ( 2100 mathrm{ml} )
11
94Tidal Volume and Expiratory Reserve Volume of an athlete is ( 500 mathrm{mL} ) and 1000
( mathrm{mL}, ) respectively. What will be his Expiratory Capacity if the Residual Volume is ( 1200 mathrm{mL} ) ?
A. ( 1500 mathrm{mL} )
B. ( 1700 mathrm{mL} )
c. ( 2200 mathrm{mL} )
D. ( 2700 mathrm{mL} )
11
95The presence of ( mathrm{CO}_{2} ) in blood will lower
pH because ( mathrm{CO}_{2} ) combines with
with the rate of reaction increased by
( A cdot H_{2} O ) to form ( H^{+} ) and ( H C O_{3}^{-}, ) carbonic anhydrase
B. ( mathrm{H}_{2} mathrm{O} ) to form only ( mathrm{HCO}_{3} ) – carbonic anhydrase
( mathrm{C} cdot mathrm{H}_{2} mathrm{O} ) to form only ( mathrm{H}^{+}, ) carbonic ions
D. ( H^{+} ) to form ( mathrm{HCO}_{3}^{-} ), oxyhaemoglobin
11
96The vital capacity of the lung signifies
the volume of air
A. Breathe in during normal inspiration
B. Breathe out with forcible expiration
c. Breathe in with forcible inspiration
D. Volume of air expelled with forcible expiration after deep inspiration
11
97The given diagram shows respiratory
system of man.Which of the following
correctly shows the functions of the parts labelled ( mathrm{W}, mathrm{X}, ) Y and ( mathrm{Z} ) ?
A. W-Facilitates movement of air by expansion and contraction, ( mathrm{X} ) – Traps dust and helps to filter inhaled air, Y – Prevents the wind pipe from collapsing, Z – Help in exchange of gases.
B. W-Helps in gaseous exchange, ( x ) – Traps dust and helps to filter inhaled air, Y – Serves as a common passage for air and food, ( z ) – Protect the lungs from damage.
C. W-Prevents the wind pipe from collapsing, ( x ) – Serves as a common passage for air and food, Y – Helps in upward and downward movement of ribcage, Z – Trap dust and help to filter inhaled air
D. W- Facilitates movement of air by expansion and contraction, X – Helps in gaseous exchange, Y – Serves as a common passage for food and air, Z- Protect the lungs from damage.
11
98Which of the following is correct for oxygen transport?
A. Nearly 20-25 percent of ( C O_{2} ) is transported by RBCs
B. 3 percent of ( O_{2} ) is carried in a dissolved state through the plasma
C. Maximum ( C O_{2} ) transport in the form of bicarbonate
D. Both B and C
11
99The relative proportion between the
volume of ( mathrm{CO}_{2} ) released and ( mathrm{O}_{2} ) absorbed
in respiration is termed as
A. Respiratory exchange
B. Respiratory quotient
c. Respiratory phase
D. None of the above
11
100About ( 1500 mathrm{ml} ) of air left in lungs is called as
A. Tidal volume
B. Inspiratory reserve volume
c. Residual volume
D. Vital capacity
11
101Mention any two occupational
respiratory disorders and their causes in human beings?
11
102The most important muscular structure in respiratory system of rabbit is
A. External intercostal muscles
B. Internal intercostal muscles
c. Diaphgram
D. Vertebral column
11
103The gas which we breath out precipitates into milky white.
A. Sodium Chloride solution
B. Calcium Carbonate solution
c. Potassium Permanganate solution
D. Potassium Bicarbonate solution
11
104Inspiration occurs when
A. Pressure inside lungs is lower than atmospheric
pressure
B. Pressure inside lungs is higher than atmospheric
pressure
C. Pressure inside lungs is same as atmospheric pressure
D. Pressure has no effect
11
105The relationship between pressure and volume was first noted by while
confirmed their discovery and published the result.
A. Richard Towneley and Henry Power, Robert Boyl
B. Richard Towneley and Henry Power, Robert Hooke
C. Robert Boyle and Robert Hooke, Robert Boyle
D. None of these
11
106Name the chronic respiratory disorder caused mainly by cigarette smoking.
A. Emphysema
B. Asthma
c. Respiratory acidosis
D. cough
11
107The average breathing rate of human beings
A . ( 15-18 ) times
B. 15- 25 times
c. 10 -20 times
D. None of the above
11
108The volume of thoracic cavity increases during
A . Never
B. Expiration
c. Both A and B
D. Inspiration
11
109Fill in the blanks with approriate words. Volume of air inspired and expired in a breath in normal respiration by man is called11
110Smoke is inhaled by the
A. Digestive system
B. Respiratory system.
C. Nervous system.
D. Excretory system.
11
111Organs responsible for breathing in humans and fishes respectively are
A. Lungs in both
B. Gills and lungs
c. Gills in both
D. Lungs and gills
11
112Given below is a list of different steps (i
vi) involved in respiration.
(i) Utilisation of ( O_{2} ) by the cells for catabolic reactions
(ii) Transport of gases by the blood
(iii) Pulmonary ventilation by which
atmospheric air is drawn in and ( C O_{2} ) is released out
(iv) Release of resultant ( C O_{2} )
(v) Diffusion of ( O_{2} ) and ( C O_{2} ) between
blood and tissues
(vi) Diffusion of gases ( left(O_{2} text { and } C O_{2}right) )
across alveolar tissues.

Select an option which has correct
sequence of all the steps.
A ( . ) (iii), (vi), (ii), ( (v) ), (i) (ii)
B. (iii), (vi), (i), (v), (ii), (iv)
( c cdot(i v),(i i),(v),(i i i),(i),(v i) )
( D cdot(i v),(v i),(i),(v),(i),(text { iii }) )

11
113Which of the following is an occupational respiratory disorder?
A. Botulism
B. Anthracis
c. Emphysema
D. silicosis
11
114Which component from the inhaled air is used by the body?
A. Carbon dioxide
B. Nitrogen
c. oxygen
D. Hydrogen
11
115Direction: Refer to the given graph and
select the correct options for the
questions that follow.
Which of these is correct regarding D, E
and ( F ) areas in the graph?
A. D shows venous blood in exercise
B. E shows normal venous blood
c. F shows normal arterial blood
D. All of the above
11
116Animals die due to excess of carbon
dioxide gas because it is poisonous.
A. True
B. False
11
117Fill up the blanks in the following paragraph by selecting the correct
option.
The movement of air into and out of the
lungs is carried out by creating a
(i) ( _{–}- ) between the lungs and the atmosphere. Inspiration can occur if intra-pulmonary pressure is
(ii) than the atmospheric pressure. Expiration takes place when the intra-pulmonary pressure is
(iii) ( _{—} ) than the atmospheric pressure. Inspiration is initiated by the
(iv) ( _{–} ) of diaphragm which
( (v) )
the volume of thoracic
chamber in the anteroposterior axis.
A. (i) concentration gradient (ii) less (iii) higher (iv) relaxation (v)increases
B. (i) concentration gradient (ii) higher (iii) less (iv) contraction (v)decreases
c. (i) pressure gradient (ii) higher (iii) less (iv) relaxation
(v)decreases
D. (i) pressure gradient (ii) less (iii) higher (iv) contraction (v) increases
11
118Ganong’s respiroscope is enployed for demonstrating
A. Heat during respiration
B. Evolution of oxygen during respiration
C. Production of CO2 during fermentation
D. Production of CO2 during aerobic respiration
11
119Explain the process of external
respiration
11
120Whether a child died after normal birth
or died before birth can be confirmed
measuring
A. The weight of the child
c. Tidal volume of air
D. Residual volume of air
11
and select the incorrect statement
A. Carbon monoxide binds to Hb with higher affinity than oxygen and forms carboxyhemoglobin
B. Nearly ( 23 % ) of oxygen is transported as oxyhemoglobin in RBC’s of blood.
C. ( 100 mathrm{ml} ) of deoxygenated blood delivers approximately ( 4 mathrm{ml} ) of ( mathrm{CO}_{2} ) to the alveoli under normal physiological conditions.
D. About 72% of ( C O_{2} ) gets transported via blood plasma.
11
122Membrane separating air in pulmonary alveoli from blood capillaries
A. Alveolar epithelium
B. Cardiac epithelium
c. Endothelium blood capillaries
D. Both A and C
11
123What percentage of ( C O_{2} ) is transported
as ( H b C O_{2} ? )
A . 42 %
B . 10 %
c. 70 %
D. 50%
11
A. Air in the alveoli
B. Air in the lungs
C. Air in the pharynx
D. Air in the trachea and bronchi
11
125Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
A. One can breathe out air totally without oxygen
B. One can breathe out air through Eustachian tube by closing both nose and mouth
c. one can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
D. The lungs can be made fully empty by forcefully breathing out all air from them.
11
126What will happen if the diaphragm of a person gets ruptured in an accident?11
127Assertion
Inspiration occurs due to muscular
relaxation.
Reason
During inspiration, the diaphragm and
external intercostal muscle contract
simultaneously.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
128Fill in the blanks with approriate words. Inflammation in the outer covering of lungs is known as11
129The partial pressure of oxygen in the alveoli of the lungs is
A. Equal to that in the blood.
B. More than that in the blood
c. Less than that in the blood.
D. Less than that of carbon dioxide
11
130In which disease, due to narrowing of tracheal passages, alveoli are deprived of oxygen?
A. Asthma
B. Bronchitis
c. Pneumonia
D. Emphysema
11
131During inhalation and exhalation which
of the following is seen
This question has multiple correct options
A. Ribs move up and outward, diaphragm moves down
B. Ribs move down and inwards, diaphragm moves up
C. Ribs move down and outwards, diaphragm moves down
D. Ribs move up and inwards, diaphragm moves down
11
132The total volume of air accommodated
in the lungs at the end of maximum forceful inspiration includes:-
(A) ( boldsymbol{E} boldsymbol{R} boldsymbol{V}+boldsymbol{R} boldsymbol{V} )
(B) ( boldsymbol{T} boldsymbol{R} boldsymbol{V}+boldsymbol{E} boldsymbol{R} boldsymbol{V} )
(C) ( boldsymbol{T} boldsymbol{V}+boldsymbol{I} boldsymbol{R} boldsymbol{V}+boldsymbol{E} boldsymbol{R} boldsymbol{V}+boldsymbol{R} boldsymbol{V} )
(D) ( boldsymbol{V} boldsymbol{C}+boldsymbol{R} boldsymbol{V} )
A . A only
B. A & B
c. conly
D. c and
11
133Differentiate between.
Respiration and breathing.
11
134What is the difference between
breathing and respiration?
11
135Breathing is affected by
A. Expansion of lungs
B. Contraction of lungs
c. Both A and B
D. Heart beat
11
136During heavy exercise the breathing rate of a person slows down.
A. True
B. False
11
137Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to
A. Benign growth on mucous lining of nasal cavity
B. Inflammation of bronchi and bronchioles
c. Proliferation of fibrous tissues and damage of the alveolar walls
D. Reduction in the secretion of surfactants by pneumocytes
11
138Number of oxygen molecule that bind to a molecule of haemoglobin are
A .2
B. 3
( c cdot 4 )
D.
11
139Match the terms to these definitions.
Anaerobe, aerobe, kiss of life, spirograph, inspiration, chloride shift, tidal volume, oxygen debt tidal air.
The drawing in of the breath
11
140Asthma is characterised by
A. Spasm in bronchial muscle
c. Pain in lungs
D. Damage in diaphragm
11
141Assertion
Vocal cords consist of three pairs of mucous membrane that extend into the
lumen of the larynx.
Reason
Sound is produced by only two pairs of cords.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
142Arrange the following terms regarding process of respiration in chronological order of its decreasing volume of air
I. Expiratory reserve volume
II. Vital capacity
III. Tidal volume
IV. Residual volume
A. ( I I rightarrow I V rightarrow I rightarrow I I I )
B. ( I I rightarrow I V rightarrow I I I rightarrow I )
c. ( I rightarrow I V rightarrow I I I rightarrow I I )
D. ( I V rightarrow I rightarrow I I I rightarrow I )
11
143During running or cycling, Which of the following organs have to increase their activity
A . Heart
B. Lungs
c. Both (1) and (2)
D. Kidneys
11
144Residual volume is
A. Lesser than tidal volume
B. Greater than inspiratory volume
C. Greater than vital capacity
D. Greater than tidal volume
11
145Name the sound producing organ of human being?11
146The large muscular sheet which forms
the floor of the chest cavity is known as
A. Diaphragm
B. Lungs
c. Ribcage
D. None of the above
11
147Carbon dioxide is carried in the blood,
mainly as
A. Sodium bicarbonate
B. Potassium bicarbonate
C. Carbamino-haemoglobin
D. Dissolved gas in plasma
11
148What is another name for the wind
pipe?
A. Trachea
B. Larynx
c. oesophagus
D. Lungs
11
149How do alveoli help in gas exchange?11
150Which one of the following helps in
transportation of ( boldsymbol{C O}_{2} ) ?
A. Acetylcholinesterase
B. Transferase
c. Transacetylase
D. Carbonic anhydrase
11
151The vital capacity of lungs is
A. ( 4-5 L )
B. 3.5-4.5 L
c. ( 5-6 L )
D. 4-7L
11
152Lungs become empty after forceful expiration.
A. True
B. False
11
153Very high number of alveoli present in a lung is meant for
A. More space for increasing volume of inspired air
B. More area for diffusion
c. Making the organ spongy
D. Increasing nerve supply
11
154Carbonic anhydrase is mostly active in
A. RBC
B. WBC
c. Blood Plasma
D. Blood Platelets
11
155Describe any four occupational respiratory disorders11
156How the transport of ( O_{2} ) and ( C O_{2} ) by blood happens?
A. With the help of WBCs and blood serum
B. With the help of platelets and corpuscles
c. with the help of RBCs and blood plasma
D. With the help of RBCs and wBCs
11
157is the maximum amount of air a
person can expel from the lungs after a maximum inhalation.
A. Tidal air volume
B. Vital capacity
c. Complemental air volume
D. Total lung capacity
11
158State the respective lowest and highest value of respiratory volumes.
A . TV, VC
B. ERV, IC
c. TV, TLC
D. RV, VC
11
159How is oxygen and carbon dioxide
transported in human body?
11
160Which of the following is incorrect
A. The curve, is called oxygen dissociation curve
B. The part’A’ represents percentage saturation of haemoglobin with oxygen
c. The part’B’ represents partial pressure of carbon dioxide
D. This curve is highly useful in studying the effect of factors like ( P C O_{2} ), H+ concentration, etc. on binding
( C O_{2} ) with haemoglobin
11
161Oxyhaemoglobin is converted into haemoglobin during the internal respiration because
A. An enzyme splits oxyhaemoglobin
B. Oxygen tension in tissues is less than capillary blood reaching tissues
( mathrm{c} cdot mathrm{c} mathrm{O}_{2} ) tension is low in blood that reaches tissues
D. Oxyhaemoglobin is unstable
11
162The number of time a person breathes
in a minute is known as
This question has multiple correct options
A. Respiration rate
B. Breathing rate
c. combustion rate
D. None of the above
11
163Give an account of the disorder of
human respiratory system
11
164Match the items in Column A with those
in Column B.
11
165have higher lung capacities than humans.
A. Elephants
B. Birds
c. cheetahs
D. Both A and C
11
166Silicosis occurs due to
A. Acid rain
B. Ozone depletion
C. Inhalation of aerosols
D. Inhalation of silica dust
11
167The function of tracheal hair is to
A. Pass mucus out
B. Pass mucus in
c. Pass air out
D. Pass air in
11
168Air that remains in lung after most powerful expiration is
A. Inspiratory air
c. Tidal air
D. Residual air
11
169People who have migrated from the planes to an area adjoining Rohtang
A. Have more RBCs and their haemoglobin has a lower binding affinity to ( O_{2} )
B. Are not physically fit to play games like football
c. suffer from altitude sickness with symptoms like nausea, fatigue, etc
D. Have the usual RBC count but their haemoglobin has very high binding affinity to ( O_{2} )
11
170Which of the following is a chronic inflammatory disease?
A. Asthma
B. Acapnia
c. oligopnea
D. Hypoxia
11
171Which of the following is not a feature of an efficient gas exchange surface?
A . thick walls
B. close proximity to blood capillaries
c. moist lining
D. large surface area
11
172Among mammals, the efficiency of ventilation of lungs as compared to reptiles and birds is better developed by the presence of
A. Ribs and costal muscles
B. Only ribs
c. only costal muscles
D. Diaphragm
11
173The breathing rate of an adult at exercise and rest respectively will be
A. 25 and 18 times per minute
B. 18 and 25 times per minute
c. 35 and 28 times per minute
D. 28 and 35 times per minute
11
174Oxygen in expired air
A . ( 10 % )
B . 16%
c. ( 19 % )
D. 4%
11
175Mention a cause and symptom of each
of the following
(i) Emphysema
(ii) Renal calculi
(iii) Diarrhoea
11
176How the man’s
respiration will be affected if he ascends
a height of 25000 feet
A. No effect on respiration
B. Respiratory rate will be decreased
C. Respiratory rate will be increased
D. Anything can happen
11
177Discuss the transport of gases ( left(O_{2} ) and right.
( left.C O_{2}right) ) in the blood.
11
178Chloride shift occurs in response to
A . ( H^{+} )
в. ( K^{+} )
( mathrm{c} cdot mathrm{H} mathrm{CO}_{3} )
D. ( N a^{+} )
11
179Fill in the blanks with approriate words. The impulse for voluntary muscles during forced breathing starts in11
180Which of the following forms the floor of
the chest cavity?
A. Lungs
B. Membrane
c. Diaphragm
D. Pleura
11
181The volume of air that can be breathed
in by maximum forced inspiration over and above the normal inspiration is
called
A. Expiratory reserved volume
B. Inspiratory reserved volume
c. vital capacity
D. Inspiratory capacity
11
182The combination of oxygen with haemoglobin is called as
A. Oxidation
B. Oxyhaemoglobin
c. Reduction
D. None of the above
11
183The exchange of gases between which of the following is called external respiration?
A. Lung alveoli and blood capillaries
B. Lung alveoli and bronchi
c. The buccal cavity and the external atmosphere
D. Lung alveoli and pulmonary artery
11
184In humans the alveoli are the
functioning units of external
respiration.
A. True
B. False
11
185Assertion
A rise in ( mathrm{PCO}_{2}, mathrm{H}+ ) ions and temperature
shifts the ( mathrm{Hb} mathrm{O}_{2} ) dissociation curve to
right.
Reason
A rise in ( mathrm{PCO}_{2} ) or fall in pH decreases oxygen affinity for haemoglobin.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
186A possible explanation for a smoker cough that develops when the tracheal epithelium changes from pseudostratified columnar to stratified
squamous is that
A. This change is accompanied by tumours that irritate the upper respiratory tractt
B. Stratified squamous epithelium secretes more mucin than pseudostratified columnar.
C. The stratified squamous epithelium has no cilia to remove accumulating mucus
D. The two events are unrelated
11
187Haemoglobin shows maximum affinity
with
A. Carbon monoxide
B. Carbon dioxide
c. oxygen
D. Ammonia
11
188In which of the following subject the dead space is highest?
A. Old man
B. Old woman
c. Young man
D. Young woman
11
189The structure which prevents the entry of food particles into the respiratory passage is
A. Epiglottis
B. Glottis
c. Larynx
D. Pharynx
11
190During respiration ( C O_{2} ) is transported in the form of
A. Dissolved plasma
B. Sodium carbonate
( mathrm{c} cdot mathrm{KHCO}_{3} )
D. Partly dissolved in plasma and partly in the form of sodium and potassium bicarbonate
11
191Name the body structure concerned
with the given functional activity.
Protects the lungs from mechanical injuries.
11
192Amount of ( C O_{2} ) delivered by every 100 ( mathrm{ml} ) of deoxygenated blood is
A. ( 7 mathrm{m} )
B. ( 5 mathrm{ml} )
( c cdot 4 m )
D. 27 m1
11
193( C O_{2} ) transported as bicarbonate form is
A . ( 0.9 mathrm{mL} )
B. 3.8 mL
c. ( 0.27 mathrm{mL} )
D. 2.7 mL
11
194Which of the following options correctly
represents the lungs conditions in
asthma and emphysema respectively?
A. Increased respiratory surface and inflammations of bronchioles
B. Inflammations of bronchioles, and decreased respiratory surface
C. Decreased respiratory surface, and inflammations of bronchioles
D. Increased number of bronchioles, and increased respiratory surface
11
195Which of the following process determines the breathing rate?
A. Inhalation
B. Exhalation
c. Respiration
D. Both A and B
11
196What are the functions of the following in breathing? Abdominal muscles.11
197In our body, carbon monoxide interferes with the transport of
A. Carbon dioxide
B. Ammonium sulphate
c. oxygen.
D. Hydrogen peroxide
11
198( alpha-1 ) antitrypsin is used to treat
A. Metasema
B. Polysma
c. Emphysema
D. colysema
11
199The structures participating in the air
inhalation are
A. Diaphragm and internal intercoastal
B. Diaphragm and external intercoastal
c. Abdominal muscles and intercoastal
D. All of the above
11
200Which component of air is exhaled by the body?
A. Nitrogen
B. Oxygen
c. Carbon dioxide
D. Hydrogen
11
201Many persons like to use asthma as an excuse for not being able to do well in sports. Try telling them about Down
Fraser, who was the first women to
break 60 sec in 100 m freestyle swimming. The first women to win four Olympic gold medals and the first swimmer to win the same event in three
consecutive Olympics was asthmatic. On the basis of the above passage,
i) Describe her achievements in the
field of swimming.
11
202Which of the following happens with the increase in body temperature due to enhanced metabolic activities in the
human body?
A. Oxyhaemoglobin dissociation curve will shift to right side at tissue level
B. Affinity of haemoglobin for oxygen will increase at tissue leve
C. Sensitivity of chemoreceptors to ( p O_{2} ) increases dramatically white it falls for ( p C O_{2} & H^{+} )
D. Bohr’s effect will not occur
11
203Approximately ( 70 % ) of carbon-dioxide absorbed by the blood will be transported to the lungs
A. As bicarbonate ions
B. In the form of dissolved gas molecules.
c. By binding to RBC
D. As carbamino-haemoglobin.
11
204The amount of oxygen transported by a litre of oxygenated blood to tissues of a person undergoing severe exercise will
be
A . ( 150 mathrm{ml} )
B. ( 200 m l )
( c .15 m l )
D. ( 5 m l )
11
205Arytenoid cartilage is found in
A . Hyoid
B. Sternum
c. Larynx
D. Nose
11
206Thoracic cavity is enlarged by contraction of
A. Internal Intercostal muscles
B. Diaphragm
c. Lungs
D. All of above
11
207In man, expired air contains oxygen
A . ( 4 % )
B . 10%
c. ( 16 % )
D. 20%
11
208The prime cause of altitude sickness in men due to ascent on high mountains
is
A. Excess of ( mathrm{CO}_{2} ) in blood
B. Decreased efficiency of haemoglobin
c. Decreased partial pressue of oxygen
D. Decreased proportion of oxygen in air
11
209What changes do you observe in your body during expiration process?11
210The most important function of
diaphragm of the mammals is
A. To divide the body cavity into compartment
B. To protect lungs
C. To aid in ventilation
D. None of the above
11
211The amount of volume of air that can be
inspired / expired normally is called
A. Tidal volume
B. Vital capacity
c. Residual volume
D. Normal volume
11
212Assertion
Carbon dioxide produced as a result of cellular respiration combines with water to form carbonic acid that
decreases the blood pH.
Reason
( mathrm{CO}_{2} ) must be eliminated from the body
to maintain homeostasis.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
11
213Short / long answer type questions.
Describe the events involved in the
process of breathing.
11
214Hiccough (hiccup) is due to activity of
A. Intercostal muscle
B. Food in air tract
c. Diaphragm
11
215What are the functions of the following in breathing? Ribs11
216Congestion of the lungs is one of the main symptoms in
A. Hypotension
B. Coronary artery disease
C. Angina
D. Heart failure
E. Atherosclerosis
11
217The volume of air that will remain in the
lungs after a normal expiration is called
A. Vital capacity
B. Functional residual capacity
c. Residual volume
D. Total lung capacity
11
218Maximum expiration after full inspiration is called as
A. Vital capacity
B. Lung capacity
c. Tidal volume
D. Residual volume
11
219Many persons like to use asthma as an excuse for not being able to do well in sports. Try telling them about Down Fraser, who was the first women to
break 60 sec in 100 m freestyle swimming. The first women to win four
Olympic gold medals and the first swimmer to win the same event in three
consecutive Olympics was asthmatic. On the basis of the above passage, answer the following question.
i) What do you mean by asthma?
11
220What are the functions of the following in breathing? Diaphragm.11
221Fill in the blanks with approriate words. Each haemoglobin molecule can carry molecules of oxygen, one in each11
222During inspiration, which of the following condition takes place?
A. Thoracic volume increases
B. Thoracic volume decreases
c. Thoracic volume remains same
D. None of the above
11
223is the amount of air
in a respiratory cycle.
A. Air capacity
B. Respiration capacity
c. Lung volume
D. None of the above
11
224Volume of air inspired or expired with each normal breath is called as
A. Tidal volume
B. Inspiratory capacity.
c. Total lung capacity
D. Residual volume.
11
225Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?
A. Internal intercostal muscles relax and diaphragm contracts
B. External intercostal muscles and diaphragm relaxes
c. Internal intercostal muscles contract and diaphragm relax
D. External intercostal muscles and diaphragm contract
11
226In earthworm, haemoglobin is present
in
11
227When temperature decreases, oxy-Hb curve becomes
A. more steep
B. straight
c. parabola
D. none of these.
11
228Mammalian lungs have an enormous number of minute aiveoli (air sacs)
This is to allow
A. more surface area for diffusion of gases
B. more nerve supply to keep the the lungs working
c. more space for increasing the volume of inspired air
D. more spongy texture for keeping lung in proper shape
11
229Respiratory disorder due to excessive pollution resulting in collapse and alveolar breakdown is
A. Emphysema
B. Hydrothorax
c. cyanosis
D. All of the above
11
230Which of the following represent correct blood flow pathway in pulmonary circulation?
A. Right ventricle ( underline{text {Aorta}} ) Lung ( underline{text {Pulmonary } text {Vein}} ) Left Atrium
B. ( frac{text { Pulmonary Vein Left Atrium }}{text { Pulmonary Vein }} ) Left Atrium
c. Right Ventricle Pulmonary Vein Lung Pulmonary artery Left Atrium
D. ( frac{text { Pulmonary Vein }}{text { Right Atrium }} ) Right Atrium Lung Pulmonary Vein n
11
231The act of breathing air into the body with the help of lungs is called
A. Ingestion
B. Inhalation
c. Exhalation
D. Absorption
11
232Which of the following statements are
true?
This question has multiple correct options
A. In lung capillaries ( C O_{2} ) combines with water to give carbonic acid
B. In tissue capillaries, carbonic acid breaks down to
( C O_{2} ) to water
C. In lung capillaries, the carbonic acid breaks down to ( C O_{2} ) and ( H_{2} O )
D. It tissue capillaries, the carbonic acid combines with hydrogen ions to form the bicarbonate ions
11
233What is the maximum number of ( boldsymbol{O}_{2} )
molecules which one haemoglobin molecule can carry?
11
234Carbon dioxide in the expired air is more than that in inspired air because
A. It is absorbed at the alveolar surface
B. It is released at the alveolar surface
c. Both A and B
D. None of these
11
235After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to
A ( cdot operatorname{lRV}+operatorname{ERV}+operatorname{TV}+operatorname{RV} )
B. IRV + RV + ERV
C. ( operatorname{IRV}+mathrm{TV}+mathrm{ERV} )
D. ( T V+R V+E R V )
11
236Which of the following is not a water borne disease?
A. Asthma
B. Cholera
c. Amoebiasis
D. None of the above
11
237What is a tidal volume? Find out the
tidal volume (approximate value) for a healthy human in an hour.
11
238Which of the following curve shows, how oxygen is loaded and unloaded due to
partial pressure?
A. ( O_{2} ) curve
B. ( C O_{2} ) curve
c. Bohr’s curve
D. ( O_{2} ) dissociation curve
11
239Breathing rate increase during physical exercise because
A. Cells require extra oxygen
B. Cells require extra energy
c. Cells require carbon dioxide
D. Both A and B
11
240The number of times a person breathes in a minute is called as
A. Inhalation
B. Respiratory rate
c. Breathing
D. Breathing rate
11
241The ( 0_{2} ) in the exhaled air is
11
242In silicosis the silica particles can be
seen
A. As needle shaped crystal by light microscopy
B. As needle shaped crystals under polarized light
C. As maltese cross shaped crystal by light microscopy
D. As maltese cross shaped crystals under polarized light
11
243Distinguish between Vital capacity and Total Iung capacity.11
244Breathing rate …………. during physical exercise.
A. Increases
B. Decreases
c. Remains same
D. None of the above
11
245The compound, which is soluble in
water but does not impede the oxygen
transportation, is
A . NO
в. ( S O_{2} )
( c cdot c o )
D. ( S O_{3} )
11
246Choose the correct answer from the
alternatives given
When carbon dioxide binds to
haemoglobin, which of the following compounds is formed?
A. Carbonic acid
B. Hydrogencarbonate ions
c. Oxyhaemoglobin
D. Carbaminohaemoglobin
11
247Oxygen dissociation curve in mammals
is
A. J-shaped
B. Sigmoid shapeddped
c. T-shaped
D. L-shaped
11
248In lungs, gaseous exchange occurs in
A. Bronchioles
B. Trachea
c. oesophagus
D. Alveol
11
249How does exchange of respiratory gases take place in the alveoli or lungs?11
250What could arrow 1 possibly represent in
the above diagram?
A. Carbon dioxide
B. Oxygen
c. water
D. Energy
11
251Name the chronic respiratory disorder caused mainly by cigarette smoking.
A. Asthma
B. Respiratory acidosis
c. Respiratory alkalosis
D. Emphysema
11
252Carbonic anhydrase is found in
A. wвс
в. RВС
c. Blood plasma
D. All of the above
11
253The consolidation ( & ) exudation are the
terms used when-
A. lungs are filled up with particulate matter
B. lungs are filled up with fluid
c. lungs become spongy
D. lungs become hard
11
254Which is the drug used by health workers in the management of acute respiratory illness?
A. Co – trimoxazole
B. Chloramphenicol
c. Benzyl penicillin
D. Gentamycin
11
255Name the pulmonary disease in which the alveolar surface area involved in gas exchange is drastically reduced due to damage to the alveolar walls.
A. Asthma
B. Pleurisy
c. Emphysema
D. Pneumonia
11
256Breathing movement can be estimated by This question has multiple correct options
A. Spirometer
B. Sphygmomanometer
c. Respirometer
D. None of the above
11
257Given below is an example of a certain structure and its special functional
activity:
Kidney and excretion. Fill in the blanks on a similar pattern:
Diaphragm and
11
258Dead space air in man is
A. ( 500 mathrm{mL} )
B. 150 ( mathrm{mL} )
c. 250 ( mathrm{mL} )
D. 1.5 L
11
259Short / long answer type questions. Oxygen enters the blood from the
alveolar air but carbon dioxide leaves
the blood to enter the alveolar air.
Explain.
11
260The volume of air remaining in the lungs even after a forceful expiration is
A. Tidal volume
B. Residual volume
c. Inspiratory reserve volume
D. Expiratory reserve volume
11
How would you prove that the air you breathe out is warmer?
11
262The best vital force theory was proposed
by?
A. Godlewski
B. Strasburger
c. Dixon
D. Esau
11
263Pressure within the lungs is called
A. Inter-pulmonary pressure
B. Intra-pulmonary pressure
c. Interstitial pressure
D. Alveolar pressure
11
264The breathing cycle is rhythmic whereas, exchange of gases is a continuous process. Justify this statement.11
265Which of the following factors raise the
( P_{50} ) and shifts the ( H b O_{2} ) dissociation curve to right and vice
versa?
a. Rise in ( boldsymbol{P} boldsymbol{c o}_{2} )
b. Fall in temperature
c. Rise in ( boldsymbol{H}^{+}(=text {fall in } mathrm{pH} ) )
d. Fall in diphosphoglyceric acid
A. a and b are correct
B. b and d are correct
c. a and c are correct
D. a, b and c are correct
11
266Differentiate between
Tidal volume and residual volume
11
267Acquiring an oxygen debt is evidence
that
( A cdot O_{2} ) cannot be stored in tissue.
B. Aerobic respiration is more complex than glycolysis.
C. Lactic acid can be converted into glycogen.
D. Anaerobic process are slower than aerobic processes.
11
268The average lung capacity is
A. 7 litres
B. 6 litres
c. 9 litres
D. 5 litres
11
269Choose the correct answer from the
alternatives given.
In which of the following forms ( C O_{2} ) is mostly carried in blood?
A. Hydrogencarbonate ions
B. Carbonic acid
c. Carbonate ions
D. Carbaminohaemoglobin
11
(A) Nasal chamber opens into
nasopharynx which is a portion of
pharynx
(B) Larynx produces sound during inspiration as well as expiration
(C) During swallowing gullet can be covered by a thin elastic cartilagenous flap called epiglottis
(D) Trachea is get divided at the level of the 6th thoracic vertebra into right and
left primary bronchi.
(E) The braching network of bronchi, bronchioles and alveoli comprise the lungs.

How many statements are not correct-
( A cdot 2 )
B. 3
( c cdot 4 )
D.

11
271During inspiration, muscles of diaphgram
A. Contracts
B. Expands
c. No effect
D. Coiled like string
11
272In humans, the concentration of carbon
dioxide in the plasma
A. Causes increased production of hydrochloric acid
B. Regulates gastric acid production by forming carbonic acid
C. Regulates breathing rate by its effect on the medulla
D. Causes inflammation of the tissues of the bronchial tubes
11
273“Emphysema” is a condition in which
A. Respiratory centre is inhibited
B. Lots of fluid in the lungs
C. The walls separating the alveoli break
D. Lungs have excess ( O_{2} )
11
274The disease caused by asbestos is
A. Emphysema
B. Paralysis
c. Diarrhoea
D. Dysentery
11
275Which of the following factors affect the oxygen dissociation curve?
A. Partial pressure of carbon dioxide
B. ( p Hleft(H^{+} ) ion concentration) right.
c. Temperature
D. Partial pressure of oxygen
E. All of the above
11
276Give reasons for the right and left shift
in the oxygen-hemoglobin dissociation
curve
11
277Differentiate between.
Inspiratory capacity and expiratory capacity
11
278Assertion
Hb reacts with ( O_{2} ) in a way that is
remarkable in comparison to other
chemical reactions.
Reason
Each molecules of iron in Hb can take
two atoms of ( O_{2} ) at its saturation point.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is
not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.
11
279Assertion
Symptoms of emphysema develops when a person living on plains ascends
and stays on a mountain.
Reason
Air pressure and partial pressure of oxygen falls with the rise in altitude.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct
11
280The volume of air present in the lungs after forceful expiration is called as
A. Tidal volume
B. Residual air
c. complementary air
D. None of the above
11
281Draw a schematics representation of transport and exchange of oxygen and carbon dioxide in human body11
282Very short answer type. How many molecules of oxygen can one haemoglobin molecule transport?11
283Diffusion of the gases is affected at alveolar level in all the following conditions except
A. Emphysema
B. Tuberculosis
c. Lung fibrosis
D. Asthma
11
284During which of the following process the diaphragm moves down?
A. Inspiration
B. Expiration
c. coughing
D. None of the above
11
285Given below is an example of a certain structure and its special functional
activity:
Kidney and excretion. Fill in the blanks on a similar pattern:
C-shaped cartilage rings and
11
286Fill in the blanks with approriate words. Sound is produced by vibrations of located in the11
287What is asthma?11
288Which of the following factors are involve in left shifting of oxygen dissociation curve?
A. High ( P O_{2} ) and low pH
B. High ( P C O_{2} ) and high ( H^{+} ) concentration
c. Low ( P O_{2} ) and low temperature
D. High ( P O_{2} ) and low temperature
11
289A person travelling from sea level to high altitudes can develop
A. High risk sickness
B. Sea level sickness
c. Altitude sickness
D. All of the above
11
290A child breathes nearly
A. 13 times a minute
B. 26 times a minute
c. 52 times a minute
D. 72 times a minute
11
291Short / long answer type questions. Briefly describe how the atmospheric air is drawn into lungs.11
292Pneumoconiosis is a type of?
A. Emphysema
B. Occupational renal disease
c. Occupational respiratory disease
D. coronary artery disease
11
293Percentage of oxygen transported by haemoglobin is
A . 93
B. 95
c. 97
D. 99
11
294Name the body structure concerned
with the given functional activity:
Helps to increase the volume of the
chest cavity lengthwise
11
295Rapid deep breathing is
A. Dyspnoea
B. Hypopnoea
c. Hyperpnoea
D. None of the above
11
296What percentage of ( C O_{2} ) flows in blood
in form of bicarbonates?
A . 7%
B. 23%
c. 50%
D. 70%
11
297Give a brief account on Expiratory
capacity (EC)
11
298Choose the odd one out in each of the
following groups of four items each:
Trachea, Bronchus, Alveolus, Diaphragm
11
299Complete the following sentences by selecting the correct option.
(A) Inspiratory capacity (IC) = (i) + IRV
(B) ( (i i)=T V+I R V+E R V )
(C) Functional residual capacity ( (mathrm{FRC})= ) ERV ( +(text { iii }) )
A. (ii)Vital capacity (ii) Tidal volume (iii)Residual volume
B. (i)Expiratory capacity
(ii) Residual volume (iii) Inspiratory reserve volume
c. (i)Tidal volume (ii) Vital capacity (iii) Residual volume
D. (i)Tidal volume (ii) Total lung capacity (iii) Expiratory capacity
11
300Combination of haemoglobin with ( O_{2} ) in lungs can be promoted by
( A cdot ) Increasing ( C O_{2} ) concentration in blood
B. Increasing ( O_{2} ) concentration in blood
C. Decreasing ( O_{2} ) concentration in blood
D. Introducing ( C O ) in blood
11
301Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at
A ( cdot ) low ( O_{2} ) pressure in tissue
B. high ( O_{2} ) pressure in tissue
c. equal ( O_{2} ) pressure inside and outside tissue
D. all times irrespective of ( O_{2} ) pressure
11
302Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely
to be correct?
A. Carbon dioxide
B. Carbon monoxide
c. Carbon disulphide
D. chloroform
11
303Define vital capacity. What is its
significance?
11
304Which of the following is a respiratory disease?
A. Polio
B. Arthritis
c. Asthma
D. cancer
11
305Bucket handle movements is seen in
( mathbf{A} cdot 1^{s t} ) rib
B. ( 3^{r d} ) rib to ( 5^{t h} ) rib
c. ( 6^{t h} ) rib to ( 10^{t h} ) rib
D. ( 11^{t h} ) and ( 12^{t h} ) rib
11
306State one function of each of the
following:
Pleural fluid
11
307Which one of the following statements
İs incorrect?
A. The residual air in lungs slightly decreases the efficiency of respiration in mammals
B. The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
C. In insects, circulating body fluids serve to distribute oxygen to tissues
D. The principle of counter current flow facilitates efficient respiration in gills of fishes
11
308Match the columns.
A ( begin{array}{clcc} & text { List I } & & text { List } \ & & & text { II } \ text { A } & text { Residual volume } & 1 & 4.6 mathrm{L} \ text { B } & text { Vital capacity } & 2 & 1.2 mathrm{L} \ text { C } & begin{array}{l}text { Inspiratory reserve } \ text { volume }end{array} & 3 & 3.5 mathrm{L} \ text { D } & text { Inspiratory capacity } & 4 & 3 mathrm{L}end{array} )
A. ( A-2, B-1, C-4, D-3 )
B. ( A-2, B-1, C-3, D-4 )
D. ( A-1, B-2, C-3, D-4 )
11
309In the normal expiration, the diaphragm is
A. Arched
B. Flattened
c. Not involved
D. Perforated
11
310If a man from sea
coast goes to Everest peak then
A. His breathing and heart beat will increase
B. His breathing and heart beat will decrease
C. His respiratory rate will decrease
D. His heart beat will decrease
11
311A person can hold his breath longer if he gradually exhales than if he keeps his lungs fully expanded. This phenomenon is due to the fact that
A. the concentration of ( mathrm{CO}_{2} ), in the blood decreases lessening the excitatory input to the carotid bodies
B. he is then using less 0 , as his thoracic muscles are not working as hard
c. stretch receptors in his lungs are then not firing as much thus lessening the excitatory input to the expiratory centress
D. he is preventing the pressure in his lungs from increasing too much
11
312After forceful inspiration, the amount of air that can be breathed out by maximum forced expiration is equal to
A. Inspiratory Reserve Volume(IRV) + Expiratory Reserve Volume (ERV) + Tidal Volume (TV)+ Residual Volume(RV)
B. IRV + RV + ERV
c. ( mid R V+T V+E R V )
D. ( T V+R V+E R V )
11
313Increased asthmatic attacks in certain
seasons are related to
A. Hot and humid environment
B. Eating fruits preserved in tin containers
c. Inhalation of seasonal pollen
D. Low temperature
11
314The inspiratory reserve volume ( + ) tidal
volume + expiratory reserve volume is
the same as
A. Inspiratory capacity + expiratory reserve volume
B. Total lung capacity – functional residual capacity
C. Inspiratory capacity + functional residual capacity
D. Inspiratory capacity + residual volume
11
315What is breathing? Explain the mechanism of breathing.11
316Rate of respiration is directly affected
by
A ( cdot C O_{2} ) concentration
B. ( O_{2} ) in trachea
c. concentration of ( O_{2} )
D. Diaphragm expansion
11
317Pick the correct statement.
A. Contraction of internal intercostal muscles lifts up the ribs and sternum.
B. RBCs transport oxygen only.
C. Thoracic cavity is anatomically an air tight chamber.
D. Healthy man can inspire approximately 500 mL of air per minute.
E. During expiration the interpleural pressure is slightly below the surrounding atmospheric pressure.
11
318Assertion
Inspiration occurs when there is a negative pressure in the lungs with respect to the atmospheric pressure.
Reason
During inspiration, a decrease in pulmonary volume increases the intrapulmonary pressure than atmospheric pressure which forces the air from
outside to move into the lungs.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
319Assertion
Tracheae, primary, secondary and tertiary bronchi are supported by incomplete cartilaginous rings.
Reason
These rings of cartilage make the wall
non-collapsible.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
320Which one of the following statement is
correct?
A. Chest expands because air enters into the lungs.
B. Air enters into the lungs because chest expands.
C. The muscles of the diaphragm contracts because air enters into the lungs.
D. All of the above statements are correct.
11
321The air which is taken in or given out during a single breath is known as
A. Residual air
B. Vital air
c. Tidal air
D. All of the above
11
322Trachea is lined with incomplete rings
of
A. Fibrous cartilage
B. Calcified cartilage
c. Elastic cartilage
D. Hyaline cartilage
11
323Which of the following cofactor is responsible for the activity of an enzyme leading to the formation of carbonic acid in RBCs?
( mathbf{A} cdot C a^{+} )
B. ( Z n^{+} )
c. ( M n^{+} )
D. ( M g^{+} )
11
324Volume of air breathed in or out during normal breathing is called as
A. Vital capacity
B. Inspiratory reserve volume
c. Expiratory reserve volume
D. Tidal volume
11
325The total volume of air accommodated
in the lungs at the end of forced inspiration is known as Total Capacity(TLC). TLC is equal to (where, TV= Tidal volume, IRV =
Inspiratory reserve volume, ERV Expiratory reserve volume, RV= Residual volume)
A . TLC = ERV+ IRV+TV
B. TLC= TV+RV+ERV
c. ( mathrm{TLC}=mathrm{ERV}+mathrm{RV} )
D. TLC = ERV+IRV+TV+RV
11
326Which one of the following is a possibility for most of us with regards to breathing, by making a conscious effort?
A. One can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
B. The lungs can be made fully empty by forcefully breathing out all air from them.
c. One can breathe out air totally without oxygen
D. One can breathe out air through eustachian tubes by closing both the nose and the mouth.
11
327The covering of lungs in human is
A. Peritoneum
B. Pericardium
c. Pleural membrane
D. Glission capsuls
11
328Short / long answer type questions. Gaseous exchanges continue in lungs without interruption even during expiration. Explain.11
329Assertion
Changes in volume of thoracic cavity reflect on volume of pulmonary cavity.
Reason

We can alter the pulmonary volumes directly for breathing.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect

11
330Distinguish between
(a) IRV and ERV
(b) Inspiratory capacity and Expiratory
capacity
(c) Vital capacity and total lung capacity
11
331The exchange of gases in the alveoli of the lungs takes place by
A. Osmosis
B. Simple diffusion
c. Passive transport
D. Active transport
11
332Assertion
In mammals, complex respiratory
system has developed.
Reason
Mammalian skin is impermeable to
gases.
A. Both Assertion and Reason are correct and Reason is
the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
333How much ( C O_{2} ) can be carried by 100
( mathrm{ml} ) of blood?
A . 20 ( mathrm{m} )
B. 0.3 ( m )
c. 3.7 ( m )
D. ( 6.3 mathrm{m} )
11
334Which one from the following is associated with occupational hazard?
A. Auorosis
B. Pneumoconiosis
c. silicosis
D. Both B and C
11
335Mammals have negative -pressure breathing.11
336( frac{sqrt{6}}{frac{sqrt{6}}{5}} )11
337Describe oxygen-haemoglobin dissociation curve11
338Mark the true statement among the following with reference to normal
breathing.
A. Inspiration is a passive process whereas expiration is active
B. Inspiration is an active process whereas expiration is passive
C. Inspiration and expiration are active processes.
D. Inspiration and expiration are passive processes.
11
339Emphysema is a
A. Cardiovascular disease
B. Pulmonary disease
C. Neural disease
D. Renal disease
11
340Although much ( C O_{2} ) is carried in blood,
yet blood does not become acidic,
because
A. ( C O_{2} ) is absorbed by the leukocytes
B. ( C O_{2} ) combines with water to form ( H_{2} C O_{3} ) which is
neutralised by ( N a_{2} C O_{3} )
c. ( C O_{2} ) transport and blood buffers play an important role in it
D. it is continuously diffused through the tissues and is not allowed to accumulate
11
341Asthma is a respiratory disease caused
due to
A. Infection of trachea
B. Infection of lungs
c. Bleeding in pleural cavity
D. Spasm in bronchial muscles
11
342Identify the correct statement with
reference to transport of respiratory
gases by blood.
A. Haemoglobin is necessary for transport of carbon dioxide and carbonic anhydrase for transport of oxygen.
B. Haemoglobin is necessary for transport of oxygen and carbonic anhydrase for transport of carbon dioxide.
C. Only oxygen is transported by blood.
D. Only carbon dioxide is transported by blood.
11
343What is the vital capacity of our lungs?
A. Inspiratory reserve volume plus functional residual capacity.
B. Total lung capacity minus expiratory reserve volume.
C. Inspiratory reserve volume plus expiratory reserve volume
D. Total lung capacity minus residual volume.
11
344Breathing rate increases which of the following value?
A. Pulse rate
B. Metabolic rate
c. Exhalation
D. All of the above
11
345Transport of ( C O 2 ) is in the form of
A. Sulphates
B. Phosphates
c. carbonates
D. chloride
11
346In man expired air contains oxygen about
A . ( 4 % )
B . 10%
c. ( 16 % )
D. 20%
11
347Respiratory distress syndrome occur in patients which lack
A . Larynx
B. Dipalmitoy| lecithin
c. surfactant
D. Both b and c
11
348When you go far a trek/trip to any high altitude places, you are advised to take
it easy and rest for the first two days. Comment giving reasons.
11
349Fill in the blanks with approriate words. The maximum volume of inspirable air is called11
350Expiration is normally brought about by the relaxation of diaphragm
A. True
B. False
11
351Pleurisy is
A. Air in pleural cavity
B. Blood in pleural cavity
C. Both A and B
D. Inflammation of pleural membrane
11
352Which of the following is considered to
be a breath
A. 2 inhalation +2 exhalation
B. 1 inhalation +2 exhalation
c. 2 inhalation +1 exhalation
D. 1 inhalation +1 exhalation
11
353Which of the following sequences is correct to initiate inspiration?
(i) The contraction of external
intercostal muscles raises the ribs and
sternum
(ii) Volume of thorax increases in the dorso-ventral axis
(iii) Intrapulmonary pressure decreases
(iv) Diaphragm contraction
(v) Air rushes into lungs
(vi) Volume of thorax increases in the
anterior-posterior axis
( A cdot(i),(i i),(i v),(v),(i i i),(v i) )
B. (i), (ii), (iii), (iv), (vi), (v)
c. (i), (ii),(iv),(vi),(iii),(v)
D. (vi), (v), (i), (ii), (iii), (iv)
11
354The tissue respiration refers to
A . Inspiration
B. External respiration
c. Internal respiration
D. Expiration
11
355Listed below are four respiratory capacities (a -d) and four jumbled respiratory volumes of a normal human
Respiratory capacities Respiratory volumes
(a) Residual volume 2500 mL
(b) Vital capacity ( 3500 mathrm{mL} )
(c) Inspiratory reserve volume 1200
( mathrm{mL} )
(d) Inspiratory capacity 4500
( mathrm{mL} )
Which one of the following is the correct matching of two capacities and volumes?
A ( . ) (a)4500 ( mathrm{mL} ) (b)3500 ( mathrm{mL} )
B. (b)2500 ( mathrm{mL} ) (с) 4500 ( mathrm{mL} )
c. ( (c) 1200 mathrm{mL} ) (d)2500 ( mathrm{mL} )
D. (d) 3500mL (a)1200 ( m L ) L
11
356Residual air mostly occurs in
A. Alveoli
B. Bronchus
c. Nostnls
D. Trachea
11
357Chronic obstructive pulmonary disease (COPD) is due to
A. Damage to the lungs
B. Damage to the kidneys
c. Damage to the stomach
D. None of the above
11
358During inspiration, the diaphragm
A. Relaxes to become dome-shaped
B. Contracts and flattens
c. Expands
D. shows no change
11
359Vital capacity of lungs is
( mathbf{A} cdot mid R V+E R V )
B. IRV + ERV + TV – RV
c. ( operatorname{lRV}+operatorname{ERV}+operatorname{TV}+operatorname{RV} )
D. IRV + ERV + TV.
11
3609 cartilages among them 3 are paired and 3 are unpaired occurs in
A. Pharynx
B. Larynx
c. Glottis
D. Bronchial tube
11
361Assertion
Tidal volume is the volume of air
inspired or expired with the normal breath.
Reason
Adult person contains 500 mL expired or inspired volumes of air with each
normal breath.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
c. Assertion is correct but Reason is incorrect
D. Both Assertion and Reason are incorrect
11
362Fill in the blanks:
Component Inspired air Expired air Oxygen
( a )
Nitrogen ( 79 % )
( A cdot a=5.6 %, b=21.6 % )
B. ( a=20.96 %, b=79.6 % )
c. ( a=28.8, b=98 % )
D. ( a=1 %, b=2 % )
11
363Carbon monoxide can kill a person
because of it’s extremely high affinity for
A. haemoglobin
B. phytochrome
c. cytochrome
D. none of these.
11
364Read the given statements and select
the correct option.

Statement 1: Mammals can eat while breathing.

Statement 2 : Mammals have negative-
pressure breathing.
A. Both statements 1 and 2 are Correct
B. Statement 1 is correct but statement 2 is incorrect
c. Statement 1 is incorrect but statement 2 is correct
D. Both statements 1 and 2 are incorrect.

11
365Person living at sea level has lung capacity than a person living at high altitudes.
A. smaller
B. Higher
c. Equal
D. None of the above
11
366Which of the following statements is
not true?
The partial pressure of
A. Oxygen in deoxygenated blood is ( 40 mathrm{mm} ) Hg
B. Oxygen in deoxygenated blood is ( 95 mathrm{mm} ) Hg
c. oxygen in alveolar air is ( 104 mathrm{mm} ) Hg
D. Carbon dioxide in the alveolar air is 40 ( mathrm{mm} ) Hg
11

Hope you will like above questions on breathing and exchange of gases and follow us on social network to get more knowledge with us. If you have any question or answer on above breathing and exchange of gases questions, comments us in comment box.