- 1(current)
Q. No.
Assertion (A): Reversal of the polarity of the membrane generates an action potential.
Reason (R): Membranes are positive on the outer surface at the resting stage.
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): Membranes are positive on the outer surface at the resting stage.
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: Â Action Potential |
 70%
From NCERT
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Assertion (A): Repolarisation of the axonal membrane results in the development of positive charge on the outer side and negative charge on the inner side
Reason (R): Nerve impulse is another name for action potential
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): Nerve impulse is another name for action potential
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: Â Origin of Resting Membrane Potential |Â Action Potential |
 84%
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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.
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: Â Nervous System |Â Origin of Resting Membrane Potential |Â Action Potential |Â Synapse |
 84%
From NCERT
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Assertion (A): The imbalance in concentration of Na+, K+ and proteins generates resting potential.
Reason (R): To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
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): To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
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: Â Origin of Resting Membrane Potential |Â Action Potential |
From NCERT
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- 1(current)
Q. No.
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