Control And Coordination Questions

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Control And Coordination Questions

List of control and coordination Questions

Question NoQuestionsClass
1Short / Long answer type questions.
What is a nerve fibre? Describe the
structure of a myelinated fibre.
2“Plant growth substances act together
or against each other”. Give suitable examples in support of the statement
350. Goitre is caused due to deficien-
cy of Iodine. It is prevalent in
(1) Coastal areas
(2) Hilly areas
(3) Desert areas
(4) None of these
4Explain the function of Nervous system.10
5Which of the following is a plant hormone?
A . Insulin
B. Thyroxin
c. Oestrogen
D. cytokinin
6If a person tests plant hormones for increasing the crop yield, he sprays a large plot with a selected hormone to
determine its effect in hybrid vigor. Which of the following he should avoid?
A ( .2,4- ) D
c. Gibberellin
D. Cytokinin
E. Abscisic acid
7Which of the following is the correct direction of flow of electrical impulses?
( A cdot C )
в. ( C )
( c cdot C )
D. ( C )
8Match the terms to these definitions:
all-or-none law, colour vision, afferent
nerves, efferent nerves, fovea centralis,
impulse, macula lutea, myopia, neuron, reflex, statoreceptor, visual
acuity, meninges, blind spot are the nerves which conduct nerve
impulses from the central nervous
system to the peripheral organs and
Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
Transmission across a synapse usually
requires neurotransmitters because
there is small space i.e., synaptic cleft,
that separates one neuron from another.
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.
10You are given a tissue with its potential
for differentiation in an artificial
culture. Which of the following pairs of
hormones would you add to the medium to secure shoots as well as roots?
A. Auxin and abscisic acid
B. Gibberllin and abscisic acid
c. IAA and gibberellin
D. Auxin and cytokinin
11The nerve cell has branches that
develop during cell specialisation. These branches help the nerve cell to
perform which of the following functions?
A. Communication with other cells
B. Moving from one location to the other
c. Storing extra DNA
D. Exerting force on non-nervous tissue
12Choose the correct answer from the
alternatives given.

Which of the following statements about plant hormones is not true?
A. Each naturally occurring hormone has a specific chemical structure
B. Hormones are among the principal internal regulators of plant growth
c. Responses to plant hormones may be observed in nearly any part of a plant
D. All known growth regulators of plant activities are chemicals produced naturally in plants

13Name the plant hormone that inhibits plant growth and metabolism. What is
the role of this hormone in seed
14Sheryl accidentally placed her hand over a flame and immediately pulled it back. She felt the sensation of heat and
reacted due to the action of
A. Blood cells
B. Skin surface
c. Nerve cells
D. Nucleus of cells
15Name any one hormone which increases
femaleness in plants?
16Match the columns and find the correct
& multicolumn{2}{l} { I } \
a & Auxin & II & \
b & Cytokinin & 2. & Inhibitor of growth \
c & Gibberellin & 3. & Apical dominance \
d & Ethylene & 4. & Epinasty \
& Abscisic & 5. & Induces amylase synthesis
( A )
( a-3, b-1, c-5, d-4, e-2 )
B. ( a-4, b-5, c-1, d-3, e-2 )
c. ( a-2, b-1, c-5, d-3, e-4 )
D. ( a-3, b-1, c-5, d-2, e-4 )
E. ( a-4, b-1, c-5, d-3, e-2 )
17Cut leaves remain green for longer time if dipped in
A . Auxin
B. Cytokinins
c. Ethylene
D. Gibberellins
18Endorphins reduce the perception of
pain through
A. Sedation
B. Blocking nerve transmission
c. opposing encephalins
D. All of the above
19Through the neuron, information travels
as an
A. Electrical impulse
B. Mechanical impulse
c. chemical impulse
D. None of the above
2046. Malfunction of which organ caus-
es diabetes ?
(1) Liver
(2) Pancreas
(3) Kidney (4) Heart
21Choose the correct answer from the
alternatives given
Plant hormones
A. interact with one another
B. are influenced by environmental cues
c. are active in plant embryos within seeds
D. all of the above
22The organ that helps us to recall and analyse is
A. Muscles
B. Brain
c. spinal cord
D. Nerve
23What is control and coordination?10
2435. Which gland in the human
body regulates the secretion of
hormones from the pituitary
(1) Thymus gland
(2) Thyroid gland
(3) Adrenal gland
(4) Hypothalamus gland
25Axon is characterised by
A. Transformation of energy
B. Receiving the impulse
C . Providing energy for impulse
D. Conduction of impulse
26The dark bands (Black bands) ( (A- )
bands) of a skeletal
muscle are known as
A. Isotropic bands
B. Anisotropic bands
c. Intercalated disc
D. cross bridges
27Write a and b in the given flow chart of neuron through which information
travels as an electrical impulse.
Dendrite ( rightarrow a rightarrow b rightarrow ) End point of neuron
28One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third increases the tolerance of plants
to various stresses. They are
A. Auxin, Gibberellins, cytokinin
B. Auxin, Gibberellins, ABA
c. Gibberellin, Auxin, Cytokinin
D. Gibberellin, Auxin, ABA
29Very short answer type.
Which plant hormone was discovered in
infected rice seedlings that grew extremely tall and slender?
30Of the following which plant hormone
inhibits growth?
A. Cytokynins
B. Gibberelins
c. Auxins
D. Abscisic acid
31Match the columns and choose the
correct combination.
Regulator Action
( (a) )
Delays leaf
( (b) )
Ethylene ( quad(2) quad begin{array}{l}text { Inhibits seed } \ text { germination }end{array} )
( (c) )
(3)( quad ) Herbicide
( (d) )
Auxin ( quad(4) quad begin{array}{l}text { Hastens fruit } \ text { ripening }end{array} )
A ( . a-2, b-4, c-1, d-3 )
в. ( a-1, b-2, c-3, d-4 )
c. ( a-2, b-3, c-4, d-1 )
D. ( a-2, b-1, c-3, d-4 )
E . ( a-3, b-4, c-1, d-2 )
32Conduction of nerve impulse is
A. Faster in non-myelinated fibres
B. Faster in myelinated fibres
C. No difference in the rate of conduction in myelinated and non-myelinated fibres.
D. None of the above
33What is the role of gibberellins in plant growth and development?10
34Nerve impulse is a
A. Physical process
B. Chemical process
C . Effected process
D. Electron-chemical process
35Match the terms to these definitions.
adipose tissue, blood, cardiac muscle, compact bone, connective tissue,
endocrine gland, epidermis, epithelial tissue, exocrine gland, fibroblast, homeostasis, lacuna, ligament, organ system, skeletal muscle, spongy bone, tendon tissue, nervous tissue, striated muscle.
A firm, white, fibrous inelastic cord
which attaches muscle to bone.
36Bring out the Physiological effects of
37Plants do not have glands, then how do
they secrete hormones?
A. Each cell is capable of producing hormones
B. One cell produces hormone and then is transferred to others
C. Hormones are produced by soil and taken up by the roots
D. None of these
38Plant hormones can be used by farmers
to manage plant growth. Give two examples of the commercial value of plant hormones.
39Why is the flow of signals in a synapse from axonal end of one neuron to
dendritic end of another neuron but not
the reverse?
A. Axons do not have receptors for neurotransmitters
B. Dendritic ends have receptors for neurotransmitters
c. No synthesis of neurotransmitter takes place at the dendritic end
D. All of the above
40Which of the following is a gaseous hormone?
A. Kinetin
B. Zeatin
c. Auxin
D. Ethylene
41Speed of nerve impulse in mammals is
A. 1 meter / sec
B. 100 meter/sec
c. 1000 meter / sec
D. None of the above
42The role of gibberellin is
A. Inhibits lateral buds
B. Stimulates fruit ripening
C. Maintains seed dormancy
D. Stimualtes rapid stem elongation
E. All of the above
4335. Movement of hairs in Drosera
is referred to as
(1) Heliotropism
(2) Thigmotropism
(3) Photonastic
(4) Seismonastic
44In the resting state of the neural
membrane, diffusion due to
concentration gradients, if allowed
would drive
A. ( N a^{+} ) into the cell
B. ( N a^{+} ) out of the cell
c. ( K^{+} ) into the cell
D. ( K^{+} ) and ( N a^{+} ) out of the cell
45Which of the following statements
about the transmission of the nerve
impulse is incorrect?
A. Nerve impulse travels from dendritic end towards axonal end.
B. At the dendritic end, electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
C. The chemicals released from the axonal end of one
neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
D. A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.
46Which of the following layers you will find in the body wall of earthworm (from outside to inside)?
A. Non-cellular cuticle, epidermis, circular muscles longitudinal muscles, coelomic epithelium
B. Cuticle, epidermis, longitudinal muscles, circular muscles, coelomic epithelium
c. Non-cellular cuticle, epidermis, coelomic epithelium, circular muscles, longitudinal muscles
D. Cuticle, epidermis, peritoneal muscles
47Very short answer type.
Which hormone keeps leaves green for a
longer time?
48Which of the following is a plant hormone?
A . Insulin
B. Thyroxine
c. Oestrogen
D. cytokinin
49a) What are plant hormones?
b) write two functions of auxin.
5037. The locomotion of plants to the
source of light is called :
(1) Phototropic (2) Hydrotropic
(3) Phototactic
(4) Thermotactic
51is the part of a neuron where information is acquired.
A. Dendrite
B. Axon
c. Nephron
D. Medulla
52Match the definition to the apt term in
the list given below:
The principle that transmission of an impulse is either at full strength or not
at all-
all-or-none law, colour vision, afferent nerves, efferent nerves, fovea centralis
impulse, macula lutea, myopia,
neuron reflex, statoreceptor, visual acuity meninges, blind spot

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