Myelin sheath is produced by
(1) Schwann cells and Oligodendrocytes

(2) Astrocytes and Schwann cells

(3) Oligodendrocytes and Osteoclasts

(4) Osteoclasts and Astrocytes

Subtopic:  Neuroanatomy |
 90%
NEET - 2017
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Choose the correct statement.
(1) Nociceptors respond to changes in pressure

(2) Meissner's corpuscels are thermoreceptors

(3) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the stimulus 

(4) Receptors do not produce graded potentials

Subtopic:  Huma Eye: Accommodation (OLD NCERT) |
 80%
NEET - 2016
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Destruction of the anterior horn cells of the spinal cord would result in loss of 

(1) sensory impulses

(2) voluntary motor impulses

(3) commissural impulses

(4) integrating impulses

Subtopic:  Motor Functions of Spinal Cord |
 54%
NEET - 2015
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Stimulation of a muscle fibre by a motor neuron occurs at

1. the neuromuscular junction

2. the transverse tubules

3. the myofibril

4. the sacroplasmic reticulum

Subtopic:  Synapse |
 87%
NEET - 2014
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Which one of the following statements is not correct?

1. Retinal is the light absorbing portion of visual photopigments 

2. In retina the rods have the photopigment rhodopsin, while cones have three different

photopigments

3. Retinal is a derivative of vitamin-C

4. Rhodopsin is the purplish red protein present in rods only 

Subtopic:  Human Eye: Adaptation (OLD NCERT) |
 86%
NEET - 2014
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A diagram showing axon terminal and synapse is given. Identify correctly A-D.

1. A- Receptor                  C-synaptic Vesicles

2. B-Synaptic connection   D-K+

3. A-Neurotransmitter        B-Synaptic cleft

4. C-neurotransmitter        D-Ca2+        

Subtopic:  Synapse |
 79%
From NCERT
NEET - 2013
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Parts A, B, C and D of the human eyes are shown in the diagram. Select the option

which gives correct identification along with its functions/characteristics

1. A-retina-contains photoreceptors-rods and cones

2. B-blind spot-has only a few rods and cones

3. C-aqueous chamber-reflects the light which does not pass through the lens

4. D-choroidits anterior part forms ciliary body

Subtopic:  Basic Anatomy of Human Eye: 1 (OLD NCERT) | Basic Anatomy of Human Eye (OLD NCERT) |
 70%
From NCERT
NEET - 2013
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Which part of the human ear plays no role in hearing as such but is otherwise very much

required?

1. Eustachian tube

2. Organ of Corti

3. Vestibular apparatus

4. Ear ossicles

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 59%
From NCERT
NEET - 2012
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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: Adaptation (OLD NCERT) |
 94%
From NCERT
NEET - 2011
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When a neuron is an resting state, ie, not conducting any impulse, the axonal membrane

is

1. equally permeable to both Na+ and K+ ions

2. impermeable to both Na+ and K+ ions

3. comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

4. comparatively more permeable to Na+ ions and nearly impermeable to K+ ions

Subtopic:  Origin of Resting Membrane Potential |
 85%
From NCERT
NEET - 2011
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