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Q. No.Identify A, B, C and D in the table:
Impulse conduction in myelinated nerve fibre
Impulse conduction in unmyelinated nerve fibre
A
B
Action potential jumps from one node of Ranvier to another
Action potential travels along the entire length of fibre
Conduction is very fast and called saltatory conduction
Conduction is slow
C
D
Options
A
B
C
D
1.
Depolarisation occurs only at the nodes of Ranvier
Depolarisation occurs all along the length of nerve fibre
Energy expenditure is less
Energy expenditure is more
2.
Depolarisation occurs all along the length of nerve fibre
Depolarisation occurs only at the nodes of Ranvier
Energy expenditure is less
Energy expenditure is more
3.
Depolarisation occurs only at the nodes of Ranvier
Depolarisation occurs all along the length of nerve fibre
Energy expenditure is more
Energy expenditure is less
4.
Depolarisation occurs all along the length of nerve fibre
Depolarisation occurs all along the length of nerve fibre
Energy expenditure is less
Energy expenditure is more
Subtopic: Nervous System |
53%
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Read the following statements and choose the correct option:
A. Owls move freely during night.
B. They have large number of rods on their retina.
1. Both the statements A and B are correct and B is the correct explanation of A
2. Both the statements A and B are correct but B is not the correct explanation of A
3. Statement A is correct and B incorrect
4. Statement B is correct and A incorrect
A. Owls move freely during night.
B. They have large number of rods on their retina.
1. Both the statements A and B are correct and B is the correct explanation of A
2. Both the statements A and B are correct but B is not the correct explanation of A
3. Statement A is correct and B incorrect
4. Statement B is correct and A incorrect
Subtopic: Huma Eye: Accommodation (OLD NCERT) |
85%
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Which of the following is correct?
1. Adrenergic nerve fibres release neurotransmitters adrenalin and nor-adrenaline at their terminations
2. Cholinergic nerve fibres release neurotransmitter acetylcholine at their termination
3. Adrenergic fibres are generally preganglionic sympathertic fibres
4. More than one options are correct
1. Adrenergic nerve fibres release neurotransmitters adrenalin and nor-adrenaline at their terminations
2. Cholinergic nerve fibres release neurotransmitter acetylcholine at their termination
3. Adrenergic fibres are generally preganglionic sympathertic fibres
4. More than one options are correct
Subtopic: Nervous System |
72%
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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.
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 |
72%
From NCERT
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Assertion (A): Photoreceptors are not present in the blind spot of the eye.
Reason (R): Blind spot is situated at a point medial to and slightly above the posterior pole of the eyeball.
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.
Reason (R): Blind spot is situated at a point medial to and slightly above the posterior pole of the eyeball.
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: Basic Anatomy of Human Eye (OLD NCERT) |
67%
From NCERT
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Assertion(A): The electrical potential difference across the resting plasma membrane is called as the resting potential.
Reason(R): The charge difference across the membrane makes the membrane polarised.
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.
Reason(R): The charge difference across the membrane makes the membrane polarised.
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: Origin of Resting Membrane Potential | Action Potential |
58%
From NCERT
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Assertion (A): The cristae and maculae are the specific receptors of the vestibular apparatus.
Reason (R): Cristae and maculae maintain balance and body posture.
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.
Reason (R): Cristae and maculae maintain balance and body posture.
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: Inner Ear: Vestibular Apparatus (OLD NCERT) |
54%
From NCERT
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Assertion (A): The axonal membrane of the neuron during resting stage is more permeable to potassium ions (K+) and nearly impermeable to sodium ions (Na+)
Reason (R): In resting state neurons does not conduct any impulse, so these don’t require ATP to remain in a resting state
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.
Reason (R): In resting state neurons does not conduct any impulse, so these don’t require ATP to remain in a resting state
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: Origin of Resting Membrane Potential | Action Potential |
From NCERT
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Assertion (A): When light strikes the retina, potential differences are generated in photoreceptors
Reason (R): Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin which in turn causes membrane permeability changes.
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.
Reason (R): Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin which in turn causes membrane permeability changes.
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: Human Eye: Adaptation (OLD NCERT) |
77%
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The axoplasm inside the axon contains:
| 1. | low concentration of K+ |
| 2. | high concentration of negatively charged proteins |
| 3. | high concentration of Na+ |
| 4. | equal concentrations of Na+ and K+ |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
86%
From NCERT
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