Q. No.In the internal ear, the membranous labyrinth is filled with:
1. cerebrospinal fluid
2. plasma
3. endolymph
4. perilymph
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The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B
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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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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
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Match the following columns and select the correct option
| Column I | Column II | ||
| (a) | The organ of Corti | (i) | Connects the middle ear and pharynx |
| (b) | Cochlea | (ii) | Coiled part of the labyrinth |
| (c) | Eustachian tube | (iii) | Attached to the oval window |
| (d) | Stapes | (iv) | Located on the basilar membrane |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (i) | (ii) | (iv) | (iii) |
| 4. | (ii) | (iii) | (i) | (iv) |
Match the following columns and select the correct option :
| Column I | Column II | ||
| (a) | Rods and cones | (i) | Absence of Cones photoreceptor cells |
| (b) | Blind Spot | (ii) | Cones are densely packed |
| (c) | Fovea | (iii) | Photoreceptor cells |
| (d) | Iris | (iv) | Visible coloured portion of the eye |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (ii) | (iii) | (i) | (iv) |
| 3. | (iii) | (iv) | (ii) | (i) |
| 4. | (ii) | (iv) | (iii) | (i) |
An age-related condition when the eye's lens doesn't change shape as easily as it once did [Presbyopia] is usually caused by:
1. decreasing the flexibility of the lens
2. an eyeball that is slightly too short
3. an eyeball that is slightly too long
4. a cornea with asymmetric curvature
The neuron in humans with many nerve fibers arising from its cell body and that carries impulses to the effectors would be called as:
| 1. | multipolar | 2. | bipolar |
| 3. | unipolar and sensory | 4. | multipolar and motor |
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Branched protoplasmic extensions of a nerve cell that propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron are the:
| 1. | axons | 2. | axon hillocks |
| 3. | axon collaterals | 4. | dendrites |
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