Q. No.A gymnast is able to balance his body upside down even in total darkness because of
1. Cochlea
2. Vestibular apparatus
3. Tectorial membrane
4. Organ of corti
1. Cochlea
2. Vestibular apparatus
3. Tectorial membrane
4. Organ of corti
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Most of the neurons in the cerebral cortex are:
| 1. | Unipolar | 2. | Bipolar |
| 3. | Multipolar | 4. | Pseudounipolar |
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The major refractive surface in the human eye is the:
1. Anterior surface of cornea
2. Posterior surface of cornea
3. Anterior surface of lens
4. Posterior surface of lens
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The resting axonal membrane is impermeable/nearly impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charged proteins
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
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Match the parts of the human brain in Column I with function in Column II and select the answer from the codes given:
| COLUMN I | COLUMN II | ||
| A. | Medulla oblongata | a. | Coordinating center for sensory and motor signaling |
| B. | Thalamus | b. | Regulation of gastric secretions |
| C. | Hypothalamus | c. | Thermoregulation and osmoregulation |
| D. | Hippocampus | d. | Consolidation of short term memory into long term memory |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | d | c |
| 3. | a | b | d | c |
| 4. | b | a | c | d |
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Select the answer with correct matching of the structure, its location and function.
|
Structure |
Location |
Function |
|
|
1. |
Cerebellum |
Midbrain |
Controls respiration and gastric secretions |
|
2. |
Hypothalamus |
Forebrain |
Controls body temperature, urge for eating and drinking |
|
3. |
Blind spot |
Near the place where optic nerve leaves the eye |
Rods and cones are present but inactive here |
|
4. |
Eustachian tube |
Anterior part of internal ear |
Equalizes air pressure on either side of tympanic membrane |
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During the propagation of a nerve impulse, the action potential results from the movement of
1. Na+ ions from extracellular fluid to intracellular fluid.
2. K+ ions from extracellular fluid to intracellular fluid.
3. Na+ ions from intracellular fluid to extracellular fluid.
4. K+ ions from intracellular fluid to extracellular fluid.
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Which one of the following is the correct difference between rod cells and cone cells of our retina?
|
Rod cells |
Cone cells |
||
|
1. |
Distribution |
More concentrated in centre of retina |
Evenly distributed all over retina |
|
2. |
Visual activity |
High |
Low |
|
3. |
Visual pigment contained |
Lodopsin |
Rhodopsin |
|
4. |
Overall function |
Vision in poor light |
Color vision and detailed vision in bright light |
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Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
1. Nucleus and mitochondria
2. Perikaryon and dendrites
3. Vacuoles and fibres
4. Flagellum and medullary sheath
In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
1. K+ and Na+ out of the cell.
2. Na+ into the cell.
3. Na+ out of the cell.
4. K+ into the cell.
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