The number of correct statements amongst the given statements is:

I. Somatic neural system relays impulses from the CNS to smooth muscles of the body.

II. Myelinated nerve fibers are found in spinal nerves but not in cranial nerves.

III. Sodium-potassium pump transports 3 sodium outwards and 2 potassium into the cell.

IV. Electrical synapses are rare in our system.

V. Efferent neurons carry signals from the CNS to the effector.

   1.  2         

   2.  3

   3.  4         

   4.  5

Subtopic:  Nervous System | Synapse |
 68%
From NCERT
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In the given diagram of cochlea, the tectorial membrane is represented by the letter:

                       

            1.  A                   

            2.  B

            3.  C                 

            4.  D

Subtopic:  Inner Ear: Vestibular Apparatus (OLD NCERT) |
 76%
From NCERT
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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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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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 |
 82%
From NCERT
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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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