Q. No.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
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 |
Myelin sheath around the axons in the PNS is secreted by:
| 1. | oligodendrocytes | 2. | axons |
| 3. | Schwann cells | 4. | ependymal |
| 1. | Medulla oblongata | 2. | Pons |
| 3. | Mid brain | 4. | Cerebellum |
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 |
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
The amount of light entering the human eye is regulated by:
| 1. Pupil | 2. Iris |
| 3. Cornea | 4. Ciliary body |
The tympanic membrane:
1. is covered on both sides by skin
2. is covered on both sides by mucus membrane
3. is covered with skin on the outside and by mucus membrane on the inside
4. is covered with skin on the inside and by mucus membrane on the outside
The auditory receptors in the human ear will be:
| 1. Organ of Corti | 2. Hair cells |
| 3. Macula | 4. Cupula |
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