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Q. No.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
I: Sodium ions
II: Potassium ions
III: Negatively charges proteins present in the axoplasm
Subtopic: Origin of Resting Membrane Potential | Action Potential |
84%
From NCERT
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Each time the sodium-potassium pump functions, it actively transports:
| 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. |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
86%
From NCERT
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In a resting axonal membrane:
| 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. |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
91%
From NCERT
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The electrical potential difference across the resting axonal membrane is called as the:
| 1. Resting potential | 2. Action potential |
| 3. Threshold potential | 4. Reversal potential |
Subtopic: Origin of Resting Membrane Potential | Action Potential |
85%
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Consider the given statements:
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
| I: | When a stimulus is applied at a site on the polarised axonal membrane, the membrane at that site becomes freely permeable to sodium ions. |
| II: | A rapid influx of sodium at this point leads to reversal of polarity and the membrane at the site is said to be depolarised. |
| III: | The electric potential difference at the site is called the action potential which is in fact termed as nerve impulse. |
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
Subtopic: Origin of Resting Membrane Potential | Action Potential |
87%
From NCERT
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Subtopic: Hind & Mid Brain |
95%
From NCERT
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Consider the given two statements:
| 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 |
Subtopic: Diencephalon |
53%
From NCERT
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Consider the given two statements:
| 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 |
Subtopic: Diencephalon |
90%
From NCERT
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Identify the part of the human brain:
I: where the thermostat of the human body is located
II. that has endocrine functions and synthesises neurohormones
III. that has hunger centre
IV: that has osmoreceptors and plays important role in osmoregulation
1. Thalamus
2. Cerebrum
3. Hypothalamus
4. Mid brain
I: where the thermostat of the human body is located
II. that has endocrine functions and synthesises neurohormones
III. that has hunger centre
IV: that has osmoreceptors and plays important role in osmoregulation
1. Thalamus
2. Cerebrum
3. Hypothalamus
4. Mid brain
Subtopic: Diencephalon |
93%
From NCERT
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Consider the given two statements:
Statement I: The entire process of response to a peripheral nervous stimulation, that occurs involuntarily is called a reflex action.
Statement II: A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Statement I: The entire process of response to a peripheral nervous stimulation, that occurs involuntarily is called a reflex action.
Statement II: A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.
1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct
Subtopic: Nervous System |
81%
From NCERT
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