Consider the following statements
I. Somatic neural system relays impulses from the CNS to skeletal muscles
II. Autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles
III. Unmyelinated nerve fibres are commonly found in SNS and ANS
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Subtopic: Nervous System |
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Assertion (A): Inner part of the cerebral hemisphere is called white matter.
Reason (R): Myelin sheath containing fibres of the tracts make the inner part of the cerebral hemisphere.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Nervous System |
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Assertion (A): Myelin sheath is produced by the Schawann cells
Reason (R):In myelinated nerve fibre, myelin sheath is present throughout
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
59%
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Assertion (A): The nerve impulse generated at a point in the neuron faces resistance at the sites where myelin sheath is present
Reason (R): At sites of myelin sheath axonal membrane is not exposed to the extra cellular fluid
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
53%
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Assertion (A): Procenephalon becomes thalamus and hypothalamus
Reason (R): Mesencephalon becomes mid-brain
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
79%
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Assertion (A): The peripheral nervous system is composed of all the nerves of the body associated with central nervous system.
Reason (R): Central nervous system is the site of information processing and control.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
76%
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Assertion (A): Electrical synapses are common in our nervous system.
Reason (R): Electrical synapses allow slower impulse transmission than chemical synapses.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System | Origin of Resting Membrane Potential | Action Potential | Synapse |
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Assertion (A): The sensory neuron from toes to CNS is one of the longest nerve in our body.
Reason (R): Sensory nerve from synapse at both dendrites and axon terminal.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Nervous System |
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