The resting axonal membrane is impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charges proteins present in the axoplasm
1. I and II only | 2. I and III only |
3. II and III only | 4. I, II and III |
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1. | 3 sodium ions outwards and 2 potassium ions into the cell. |
2. | 3 sodium ions into the cells and 2 potassium outwards. |
3. | 2 sodium ions outwards and 3 potassium ions into the cell. |
4. | 2 sodium ions into the cells and 3 potassium ions outwards. |
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1. | The outer surface possesses a positive charge while its inner surface becomes negatively charged. |
2. | The outer surface possesses a negative charge while its inner surface becomes positively charged. |
3. | Both the outer and the inner surface are positively charged. |
4. | Both the outer and the inner surface are negatively charged. |
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1. Resting potential | 2. Action potential |
3. Threshold potential | 4. Reversal potential |
1. Only I and II are correct | 2. Only I and III are correct |
3. Only II and III are correct | 4. I, II and III are correct |
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1. Cerebrum | 2. Thalamus |
3. Hypothalamus | 4. Cerebellum |
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I: | The cerebral cortex, referred to as the grey matter, is thrown into prominent folds. |
II: | The cerebral white mater contains motor areas, and association area. |
1. Both are correct | 2. Both are incorrect |
3. Only I is correct | 4. Only II is correct |
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I: | The association areas of the cerebral cortex are neither clearly sensory nor motor in function. |
II: | The association areas are responsible for complex functions like intersensory associations, memory and communication. |
1. Both are correct | 2. Both are incorrect |
3. Only I is correct | 4. Only II is correct |
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Identify the correct statements regarding the events A and B in the given diagram:
I: A is depolarization and is caused by the influx of sodium ions.
II: B is repolarization and is caused by the efflux of potassium ions.
1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
Given figure shows the types of neurons found in human body. Identify the correct match for their location in the body from the options given: |
I. Embryonic stages | II. Retina |
III. Dorsal root ganglion of spinal nerve | |
IV. Cerebral cortex | V. Olfactory membrane |
A | B | C | D | |
1. | I | II | III | IV |
2. | II | V | I | III |
3. | I | III | II | IV |
4. | III | IV | II | I |