In the internal ear, the membranous labyrinth is filled with:

1. cerebrospinal fluid
2. plasma
3. endolymph
4. perilymph

Subtopic:  Inner Ear: Cochlea (OLD NCERT) |
 76%
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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

Subtopic:  Human Eye (OLD NCERT) |
 94%
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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

Subtopic:  Human Eye (OLD NCERT) | Huma Eye: Accommodation (OLD NCERT) | Human Eye: Adaptation (OLD NCERT) |
 79%
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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

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 86%
From NCERT
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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
Options:
(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iv) (ii) (i) (iii)
3. (i) (ii) (iv) (iii)
4. (ii) (iii) (i) (iv)
Subtopic:  Outer & Middle Ear (OLD NCERT) | Inner Ear: Vestibular Apparatus (OLD NCERT) | Inner Ear: Cochlea (OLD NCERT) |
 82%
From NCERT
NEET - 2020
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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
Options:
(a) (b) (c) (d)
1. (iii) (i) (ii) (iv)
2. (ii) (iii) (i) (iv)
3. (iii) (iv) (ii) (i)
4. (ii) (iv) (iii) (i)
Subtopic:  Basic Anatomy of Human Eye: 1 (OLD NCERT) | Human Eye (OLD NCERT) |
 91%
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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

Subtopic:  Huma Eye: Accommodation (OLD NCERT) |
 73%
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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
Subtopic:  Nervous System |
 64%
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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

Subtopic:  Nervous System |
 74%
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The number of cranial nerves in humans is:

1. 12 2. 24
3. 31 4. 33
Subtopic:  Nervous System |
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