Q. No.In the internal ear, the membranous labyrinth is filled with:
1. cerebrospinal fluid
2. plasma
3. endolymph
4. perilymph
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
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 |
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
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 |
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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