- 1(current)
Q. No.The transmission of nerve impulses at a synapse is unidirectional.
Which of the features of the transmission of nerve impulses given below have a role in maintaining the unidirectional transmission?
1 Exocytosis of neurotransmitter at the presynaptic membrane
2 Neurotransmitter hydrolyzing enzyme found on the postsynaptic membrane
3 Neurotransmitter receptors found on the postsynaptic membrane
4 Sodium gated channels on the postsynaptic membrane
1. 2 and 4 only
2. 1, 2 and 3 only
3. 1, 3 and 4 only
4. 1 and 4 only
Subtopic: Synapse |
62%
Level 2: 60%+
Hints
Consider the following statements:
I. Acetycholine is released at the electrical synapse
II. Impulse conduction across electrical synapses is faster than chemical synapses
III. It is more difficult to regulate an electrical synapse than a chemical synapse
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 only
I. Acetycholine is released at the electrical synapse
II. Impulse conduction across electrical synapses is faster than chemical synapses
III. It is more difficult to regulate an electrical synapse than a chemical synapse
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 only
Subtopic: Synapse |
79%
Level 2: 60%+
Hints
Consider the following statements and select the correct option
1. Both Statement A and Statement B are correct
2. Both Statement A and Statement B are incorrect
3. Only Statement A is correct
4. Only Statement B is correct
| Statement A: | Impulse transmission across a chemical synapse is always faster than that across an electrical synapse. |
| Statement B: | Electrical synapses are rare in our body. |
1. Both Statement A and Statement B are correct
2. Both Statement A and Statement B are incorrect
3. Only Statement A is correct
4. Only Statement B is correct
Subtopic: Synapse |
87%
Level 1: 80%+
Hints
Assertion (A): Acetylcholine-esterase is present in the muscle cell or post synaptic neuron
Reason (R): Acetylcholine-esterase breaks down acetylcholine into acetate and choline
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 false but (R) is true.
4. Both (A) and (R) are false.
Reason (R): Acetylcholine-esterase breaks down acetylcholine into acetate and choline
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 false but (R) is true.
4. Both (A) and (R) are false.
Subtopic: Synapse |
Level 3: 35%-60%
Hints
| 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 |
86%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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