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Q. No.When the neuron is not conducting any impulse, i.e., resting, the axonal membrane:
1.
is comparatively more permeable to sodium ions and nearly impermeable to potassium ions.
2.
is freely permeable to sodium ions and potassium ions.
3.
is impermeable to sodium ions and potassium ions.
4.
is comparatively more permeable to potassium ions and nearly impermeable to sodium ions.
Subtopic: Origin of Resting Membrane Potential | Action Potential |
88%
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Subtopic: Hind & Mid Brain |
95%
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Consider the given statements:
| I: | Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. |
| II: | Unmyelinated nerve fibre is not enclosed by a Schwann cell or a myelin sheath. |
| III: | Myelinated nerve fibres are found in spinal and cranial nerves. |
| IV: | Unmyelinated nerve fibres are commonly found in autonomous and somatic neural systems. |
| 1. | Only II is incorrect | 2. | I and II are correct |
| 3. | III and IV are incorrect | 4. | All are correct |
Subtopic: Nervous System |
67%
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Consider the two statements:
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
| Statement I: | Dendrites transmit impulses towards the cell body of the neuron. |
| Statement II: | The axons transmit nerve impulses away from the cell body to a synapse or to a neuro-muscular junction. |
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is correct; Statement II is correct
4. Statement I is incorrect; Statement II is correct
Subtopic: Neuroanatomy |
93%
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Association areas in the cerebral cortex:
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: | are neither clearly sensory nor motor in function. |
| II: | are for complex functions like inter-sensory associations, memory and communication. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Fore Brain |
86%
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Which part of the human brain plays important roles in the consolidation of information from short-term memory to long-term memory?
1. Amygdala
2. Septum
3. Hippocampus
4. Superior colliculi
1. Amygdala
2. Septum
3. Hippocampus
4. Superior colliculi
Subtopic: Fore Brain |
74%
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Cerebellum is mainly involved in:
1. consciousness
2. muscle coordination
3. homeostasis
4. sense reception
1. consciousness
2. muscle coordination
3. homeostasis
4. sense reception
Subtopic: Hind & Mid Brain |
From NCERT
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A person involved in a road traffic accident sustains damage to the occipital lobe. He is likely to have trouble with:
| 1. | Hearing | 2. | Taste |
| 3. | Touch | 4. | Vision |
Subtopic: Fore Brain |
73%
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The cerebral aqueduct is a narrow 15 mm conduit for cerebrospinal fluid (CSF) that passes through the:
1. Corpus callosum
2. Diencephalon
3. Mid brain
4. Medulla oblongata
1. Corpus callosum
2. Diencephalon
3. Mid brain
4. Medulla oblongata
Subtopic: Hind & Mid Brain |
82%
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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 |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Nervous System |
54%
From NCERT
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