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Q. No.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%
Level 2: 60%+
Hints
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%
Level 1: 80%+
Hints
Subtopic: Hind & Mid Brain |
95%
Level 1: 80%+
Hints
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%
Level 1: 80%+
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Hints
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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 |
87%
Level 1: 80%+
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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 |
Subtopic: Fore Brain |
73%
Level 2: 60%+
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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 |
Level 3: 35%-60%
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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%
Level 2: 60%+
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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%
Level 1: 80%+
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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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