Q. No.
The myelin sheath around the axons is secreted in the CNS by:
1. Schwann cells
2. Oligidendrocytes
3. Microglial cells
4. Astrocytes
1. Schwann cells
2. Oligidendrocytes
3. Microglial cells
4. Astrocytes
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In the ear, the utricle and the saccule are located in the:
| 1. cochlea | 2. semicircular canal |
| 3. spiral organ (organ of Corti) | 4. vestibule |
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The major refractive surface in the human eye is the:
1. Anterior surface of cornea
2. Posterior surface of cornea
3. Anterior surface of lens
4. Posterior surface of lens
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When the ciliary muscles in the human eye contract:
1. the lens becomes more convex, generally improving the focus for closer objects
2. the lens becomes more convex, generally improving the focus for farther objects
3. the lens becomes more flat, generally improving the focus for closer objects
4. the lens becomes more flat, generally improving the focus for farther objects
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The afferent neuron receives signal from a sensory organ and transmits the impulse to the CNS via:
1. Dorsal root of the spinal nerve
2. Ventral root of the spinal nerve
3. Cranial nerve
4. Intermediolateral horn of spinal cord grey mater
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If potassium ions were the only factor causing resting membrane potential, the resting potential inside the fiber would be nearly equal to:
1. - 55 mV
2. - 70 mV
3. - 94 mV
4. + 61 mV
Olfactory epithelium extends directly into which of the following extensions of the brain’s limbic system?
| 1. Amygdala | 2. Olfactory lobe |
| 3. Septum | 4. Hippocampus |
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Membranous labyrinth of the inner ear is surrounded by:
| 1. Perilymph | 2. Endolymph |
| 3. Hemolymph | 4. Air |
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