Question 1

Which one of the following is essential for the formation of myelin sheath?

Accepted Answer

Correct answer is B

Question 2

Mammalian brain differs from an amphibian brain in possessing:

Accepted Answer

Corpus callosum is a thick whitish band of semicircular nerve fibres interconnecting two cerebral hemispheres (found only in mammals).

Question 3

Brain is:

Accepted Answer

Correct answer is A

Question 4

Which cell stops dividing after birth?

Accepted Answer

Largest cell in the body is neuron. Certain neurons may almost equal the length of body itself.

Question 5

The second cranial nerve in human originates from:

Accepted Answer

Optic nerve is sensory, therefore it originates from retina and is distributed in mid-brain.

Question 6

The ganglia of sympathetic and the central nervous system in frog develops from the:

Accepted Answer

Correct answer is D

Question 7

Which is activated in stress condition?

Accepted Answer

Sympathetic nervous system increases defence system of body against adverse conditions. It is active in stress condition. Such as pain fear and anger.

Question 8

The autonomic nervous system has control over:

Accepted Answer

Autonomic nervous system regulates and coordinates involuntary activities like heart beating, homeostasis, body temperature, breathing, gut peristalsis and secretion of glands.

Question 9

The given diagram indicates part of the human body, the structures belonging to the central nervous system are numbered.

Accepted Answer

Correct answer is B

Question 10

In man which one of the following cranial nerve is associated with the sense of body balance ?

Accepted Answer

VIII, the auditory cranial nerve.

Question 11

How many pairs of sympathetic ganglia are present in ANS.

Accepted Answer

Correct answer is C

Question 12

If a person has lost his memory in an accident, the following part of the brain have got injured.

Accepted Answer

A mammal, from whose brain cerebrum is removed loses all responses that depend upon consciousness and memory.

Question 13

The hind brain consists of:

Accepted Answer

Hind brain has two distinct part (i) metencephalon (medulla oblongata) (ii) myelencephalon (cerebellum), transverse band of white matter called pons varoli.

Question 14

Which of the following regions of the brain is incorrectly paired with its function?

Accepted Answer

Cerebellum is responsible for co-ordination of body movements.

Question 15

Which one of the following is responsible for the control of reflex action?

Accepted Answer

Reflex action is an immediate involuntary response to a stimulus with out the intervention of brain, controlled by spinal cord of central nervous system.

Question 16

The number of spinal nerves in man is:

Accepted Answer

Man has 31 pairs of spinal nerves while rabbit has 37 pairs.

Question 17

Which of the following cranial nerves are involved in the movement of eye?

Accepted Answer

III, IV and VI cranial nerves.

Question 18

The smallest cranial nerve in human being is:

Accepted Answer

The smallest cranial nerve is trochlear in human beings.

Question 19

Post-ganglionic nerve fibres of sympathetic system are:

Accepted Answer

The post-ganglionic nerve fibres of sympathetic nervous system are adrenergic i.e., they release the neurotransmitter nor-adrenaline at their termination. The sympathetic nerves stimulate the adrenal glands to secrete adrenaline.The post-ganglionic para-sympathatic fibres are cholinergic i.e., they release a chemical substance acetyl choline, a neurotransmitter, at their endings for the transmission of nerve impulses.

Question 20

The supporting and nutritive cells found in the brain are:

Accepted Answer

Ependymal cells are columnar cells that have ciliated surface. They support the central nervous system and also nutritive in function.

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