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Q. No.Consider the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | In a neuron, Nissl’s granules are present in dendrites as well as cell body |
| II: | Unmyelinated neurons in peripheral neural system are not enclosed by a Schwann cell |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Nervous System |
66%
Level 2: 60%+
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In the peripheral neural system, Schwann cells surround the axons of:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | Myelinated nerve fibres |
| II: | Unmyelinated nerve fibres |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Nervous System |
57%
Level 3: 35%-60%
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Match Column I with Column II:
Codes:
| Column I | Column II | ||
| A | Sensory neurons | P | carry signals from the CNS to effectors (muscles or glands) |
| B | Motor neurons | Q | connect sensory and motor neurons |
| C | Interneurons | R | transmit signals from sensory receptors to the central nervous system |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | P | R |
| 3. | R | P | Q |
| 4. | R | Q | P |
Subtopic: Nervous System |
77%
Level 2: 60%+
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Identify the correct statement regarding the sections of the spinal cord shown in the given diagram:
| I: | A and D are part of the grey mater |
| II: | B is motor and C is sensory |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Nervous System |
54%
Level 3: 35%-60%
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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: Origin of Resting Membrane Potential | Action Potential |
59%
Level 3: 35%-60%
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The sodium potassium pump transports:
1. three sodium ions from outside to inside a cell.
2. three sodium ions from inside to outside a cell.
3. two potassium ions from outside to inside a cell.
4. Both 2 and 3
1. three sodium ions from outside to inside a cell.
2. three sodium ions from inside to outside a cell.
3. two potassium ions from outside to inside a cell.
4. Both 2 and 3
Subtopic: Action Potential |
Level 4: Below 35%
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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: Origin of Resting Membrane Potential | 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: Origin of Resting Membrane Potential | Action Potential |
57%
Level 3: 35%-60%
Hints
Which of the following minerals reduces the excitability of nerves and muscles?
1. Potassium
2. Sodium
3. Magnesium
4. Manganese
Subtopic: Action Potential |
55%
Level 3: 35%-60%
Hints
Myelination of axons of the central nervous system is brought about by:
| 1. | microglia | 2. | asrocytes |
| 3. | oligodendrocytes | 4. | Schwann cells |
Subtopic: Nervous System |
56%
Level 3: 35%-60%
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