Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes | 2. axons |
3. Schwann cells | 4. ependymal |
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The brain stem includes all the following except:
1. Medulla oblongata | 2. Pons |
3. Mid brain | 4. Cerebellum |
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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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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. |
Amygdala |
a. |
Relays motor and sensory signals to the cerebral cortex |
B. |
Hippocampus |
b. |
Reflex centers involving vision and hearing |
C. |
Thalamus |
c. |
Plays a key role in the processing of emotions |
D. |
Corpora quadrigemina |
d. |
Formation of new memories and is also associated with learning and emotions |
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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The change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated, serving to transmit nerve signals is called as:
1. Action potential
2. Threshold potential
3. Reversal potential
4. Excitatory post synaptic potential
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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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The cranial meninge that is in contact with the brain tissue is the:
1. Dura mater | 2. Arachanoid mater |
3. Pia mater | 4. Grey matter |
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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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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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A canal called the cerebral aqueduct passes through the:
1. Cerebral hemispheres | 2. Diencephalon |
3. Mid brain | 4. Hind brain |
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