The resting axonal membrane of a neuron:

1. is not polarized

2. has an excess of anions on the outside

3. is more permeable to potassium ions than to sodium ions

4. cannot be excited by a stimulus

Subtopic:  Action Potential |
 89%
From NCERT
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The specific receptor organ in the otolith organ of the internal ear is called:

1.  Macula

2.  Crista

3.  Cupula

4.  Organ of Corti

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 62%
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In cochlea, the auditory receptors are:

1. Organ of Corti

2. Ampulla

3. Macula

4. Hair cells

Subtopic:  Inner Ear: Cochlea (OLD NCERT) |
 63%
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Consider the characteristics of a certain part of the human brain:
I. It contains neurosecretory cells.
II. It is an important part of the limbic system.
III. It is a part of the diencephalons.

This part of the human brain is:

1. Hypothalamus

2. Medulla oblongata

3. Cerebellum

4. Amygdala

Subtopic:  Diencephalon |
 83%
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Consider the following statements.

                   

(a) Occurs involuntarily and without conscious effort.
(b) At least no afferent and two efferent neuron required.
(c) Only motor neuron is involved in the action.
(d) Polysynaptic and conditional reflex.
(e) Regulated by the spinal cord.

Which of the above statements are correct for the reflex shown in the above figure?

1.  a and e

2.  b, c and d

3.  a, b, d and e

4.  a, b, c, d and e

Subtopic:  Motor Functions of Spinal Cord |
 81%
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'Retinal' is present in:

1.  Rods

2.  Cones

3.  Both 1 and 2

4.  All the retinal layer

Subtopic:  Human Eye: Adaptation (OLD NCERT) |
 54%
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The vestibular apparatus is composed of:

I.   Semi-circular canals

II.  Otolith organs

III. Organ of Corti

IV. Crista and macula

1.  I, II, III & IV

2.  I, II only

3.  IV only

4.  II only

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 66%
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Mark the incorrect match?

 1.  Cerebral aqueduct  A canal passes through the midbrain, connecting 3rd ventricle to 4th ventricle of the brain.
 2.  Corpus callosum   Thick band of nerve fibres that divides the cerebral cortex lobes into left and right hemispheres.
 3.  Limbic system    The inner part of forebrain involved in the regulation of sexual behaviour.
 4.  Pons  Consist of fibre tracts that interconnect different regions of the brain.

Subtopic:  Diencephalon |
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Myelin sheath is produced by:

1. Astrocytes and Schwann cells
2. Oligodendrocytes and Osteoclasts
3. Osteoclasts and Astrocytes
4. Schwann cells and Oligodendrocytes
Subtopic:  Nervous System |
 84%
NEET - 2017
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Nissl bodies are mainly composed of:

1. Proteins and lipids 2. DNA and RNA
3. Nucleic acids and SER 4. Free ribosomes and RER
Subtopic:  Nervous System |
 73%
NEET - 2018
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