Q. No.The re-establishment of the resting membrane potential after depolarization is primarily due to:
1. Sodium potassium pump
2. Influx of sodium
3. Efflux of potassium
4. Efflux of sodium
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1. Thalamus
2. Hypothalamus
3. Corpora quadrigemina
4. Pons
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A canal called the cerebral aqueduct passes through the:
| 1. Cerebral hemispheres | 2. Diencephalon |
| 3. Mid brain | 4. Hind brain |
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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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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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Consider the two statements:
| I: | Electric synapses are rare in our system. |
| II: | Impulse transmission across electric synapse is always faster than across a chemical synapse. |
1. Both I and II are correct and II explains I
2. Both I and II are correct and II does not explain I
3. Only I is correct
4. Only II is correct
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The primary commissural region of the brain consisting of white matter tracts that connects the left and right cerebral hemispheres is called as:
| 1. | corpus striatum | 2. | corpus luteum |
| 3. | corpus callosum | 4. | corpus spongiosum |
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Match each item in Column I [part of the brain] with one in Column II [function] and select the answer from the codes given below:
|
|
Column I |
|
Column II |
|
A. |
Medulla oblongata |
a. |
Motor control |
|
B. |
Pons varoli |
b. |
Hunger center |
|
C. |
Cerebellum |
c. |
Bridge between cerebellum and rest of brain |
|
D. |
Hypothalamus |
d. |
Gastric secretions, respiratory rhythm center |
Codes
| A | B | C | D | |
| 1. | c | d | b | a |
| 2. | d | c | a | b |
| 3. | c | d | a | b |
| 4. | d | c | b | a |
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What causes the movement of the synaptic vesicles towards the membrane during transmission of impulse across a chemical synapse?
| 1. | Sodium | 2. | Calcium |
| 3. | cAMP | 4. | cGMP |
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Myelin sheath around the axons in the PNS is secreted by:
| 1. | oligodendrocytes | 2. | axons |
| 3. | Schwann cells | 4. | ependymal |
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