Q. No.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
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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Reissner’s membrane in the inner ear separates the cochlear duct [scala media] from the:
| 1. round window | 2. scale vestibuli |
| 3. scala tympani | 4. basilar membrane |
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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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The brain stem includes all the following except:
| 1. Medulla oblongata | 2. Pons |
| 3. Mid brain | 4. Cerebellum |
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The auditory tube [also called as the Eustachian tube] functions in equalizing pressure between the middle ear and:
| 1. throat | 2. inner ear |
| 3. outer ear | 4. cochlea |
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When one enters a dark room from a bright area:
1. retinol is converted to rhodopsin and eye sensitivity is decreased
2. rhodopsin is converted to retinol and eye sensitivity is decreased
3. rhodopsin is converted to retinol and eye sensitivity is increased
4. retinol is converted to rhodopsin and eye sensitivity is increased
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