- 1(current)
Q. No.What restores the resting membrane potential of the axonal membrane at the site of excitation?
1. Influx of sodium ions
2. Efflux of sodium ions
3. Influx of potassium ions
4. Efflux of potassium ions
1. Influx of sodium ions
2. Efflux of sodium ions
3. Influx of potassium ions
4. Efflux of potassium ions
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 59%
Level 3: 35%-60%
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Hints
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Depolarisation of axonal membrane is due to influx of sodium ions. |
| Statement II: | Repolarisation of axonal membrane is due to efflux of sodium ions. |
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 65%
Level 2: 60%+
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When neuron is resting, which of the following is false with respect to that
| 1. | It is not conducting any impulse |
| 2. | Axonal membrane is more permeable to potassium ions |
| 3. | Axonal membrane won't allow any flow of sodium ions across it |
| 4. | Membrane is impermeable to negatively charged proteins |
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
 57%
Level 3: 35%-60%
Hints
If the resting membrane of an excitable cell is made permeable to all ions, which of the following is least likely to happen?
1. Efflux of potassium
2. Influx of sodium
3. Influx of chloride
4. Efflux of sodium
Subtopic: Â Origin of Resting Membrane Potential |
Level 3: 35%-60%
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Hints
As a nerve impulse passes along an axon:
1. The membrane potential changes from positive to negative and then back again
2. Sodium ions flow out through ion channels and potassium ions flow in
3. Sodium channels open as the membrane potential becomes less negative
4. The sodium-potassium pump moves sodium ions into the cell
1. The membrane potential changes from positive to negative and then back again
2. Sodium ions flow out through ion channels and potassium ions flow in
3. Sodium channels open as the membrane potential becomes less negative
4. The sodium-potassium pump moves sodium ions into the cell
Subtopic: Â Origin of Resting Membrane Potential |Â Action Potential |
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.
- 1(current)
Q. No.
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