Q. No.One of the first regions of the human brain to suffer damage in Alzheimer’s disease is the:
1. Hypothalamus
2. Cerebrum
3. Hippocampus
4. Amygdala
1. Hypothalamus
2. Cerebrum
3. Hippocampus
4. Amygdala
Under normal conditions, almost all the energy used by the brain cells is supplied by:
1. The free fatty acids in the blood
2. Glucose derived from the blood
3. Gluconeogenesis in glial cells
4. Breakdown of muscle glycogen
Mental depression psychosis, affecting millions, may be basically caused by the diminished formation in the brain of:
1. Acetylcholine
2. Dopamine
3. Serotonin
4. Glutamate
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
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 |
The scala vestibuli and scala tympani contain perilymph and are connected at the:
| 1. cochlear duct | 2. helicotrema |
| 3. semicircular duct | 4. vestibule |
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 |
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 |
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
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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