Photosensitive compound in the human eye is made up of:

1. Opsin and Retinal 2. Opsin and Retinol
3. Transducin and Retinene 4. Guanosine and Retinol

Subtopic:  Human Eye (OLD NCERT) | Huma Eye: Accommodation (OLD NCERT) | Human Eye: Adaptation (OLD NCERT) |
 87%
From NCERT
NEET - 2016
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In the mammalian eye, the ‘fovea’ is the center of the visual field, where?

1. high density of cones occur, but has no rods

2. the optic nerve leaves the eye

3. only rods are present

4. more rods than cones are found

Subtopic:  Basic Anatomy of Human Eye: 1 (OLD NCERT) | Basic Anatomy of Human Eye: 2 (OLD NCERT) | Basic Anatomy of Human Eye (OLD NCERT) |
 86%
From NCERT
NEET - 2015
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Which of the following regions of the brain is incorrectly paired with its function?

1. Medulla oblongata-Homeostatic control
2. Cerebellum-Language comprehension
3. Corpus callosum-Communication between
the left and right cerebral cortices
4. Cerebrum-Calculation and contemplation
Subtopic:  Hind & Mid Brain |
From NCERT
NEET - 2015
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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. the organ of Corti

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 78%
From NCERT
NEET - 2015
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Injury localized to the hypothalamus would most likely disrupt:

1. short-term memory

2. co-ordination during locomotion

3. executive functions, such as decision making

4. regulation of body temperature

Subtopic:  Diencephalon |
 87%
From NCERT
NEET - 2014
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The human hindbrain comprises three parts, one of which is:

1. Cerebellum 2. Hypothalamus
3. Spinal 4. Corpus callosum

Subtopic:  Hind & Mid Brain |
 86%
From NCERT
AIPMT - 2012
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A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?

1. Sympathetic nervous system activated releasing epinephrine and norepinephrine from adrenal medulla
2. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
3. Hypothalamus activates the parasympathetic division of the brain
4. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal cortex

Subtopic:  Autonomic Nervous System: 1 (OLD NCERT) | Autonomic Nervous System (OLD NCERT) |
 72%
NEET - 2012
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A canal called the cerebral aqueduct passes through the:

1. Diencephalon

2. Midbrain

3. III ventricle

4. IV ventricle

Subtopic:  Hind & Mid Brain |
 86%
From NCERT
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The parasympathetic division of the autonomic nervous system is characterized by each of these except which one?

1. Preganglionic fibers arise from the thoracic and lumbar regions of the spinal cord.

2. Terminal ganglia are located close to effector organs.

3. It controls the digestive activities.

4. Parasympathetic postganglionic fibers secrete acetylcholine.

Subtopic:  Autonomic Nervous System: 1 (OLD NCERT) | Autonomic Nervous System: 2 (OLD NCERT) | Autonomic Nervous System (OLD NCERT) |
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Which one of the following is the correct difference between rod cells and cone cells of our retina?

Features Rod cells Cone cells
(a) Visual acuity High Low
(b) Visual pigment contained Iodopsin Rhodopsin
(c) Overall function Vision in poor light Colour vision and detailed vision in bright light
(d) Distribution More concentrated in centre of retina Evenly distributed all over retina

1. a
2. b
3. c
4. d

Subtopic:  Basic Anatomy of Human Eye: 1 (OLD NCERT) | Basic Anatomy of Human Eye: 2 (OLD NCERT) | Basic Anatomy of Human Eye (OLD NCERT) |
 82%
From NCERT
AIPMT - 2008
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