Q. No.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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The neurotransmitter released by a motor neuron at the neuro-muscular junction is:
1. Acetylcholine
2. Adrenaline
3. GABA
4. Serotonin
The space between the cornea and the lens in human eye is filled with:
| 1. Aqueous humor | 2. Vitreous humor |
| 3. Lymph | 4. Air |
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The ear ossicles transmit sound waves to:
| 1. Ear drum | 2. Oval window |
| 3. Round window | 4. Cochlear duct |
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Sympathetic stimulation leads to all the following except:
1. Contraction of piloerector muscle
2. Dilation of pupil
3. Decreased peristalsis in gut
4. Bronchoconstriction
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
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
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