set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements.
Assertion (A):
During sleep, bright light is undesirable.
Reason (R):
In bright light, production of melatonin in the body is considerably increased.
Select your answer using the codes given below.
Code

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 2

Other function performed by kidney apart from excretion is

a) Temperature regulation

b) Osmoregulation

c) Hormonal regulation

d) Spermatogenesis

Question : 3

Thymosin stimulates

a) erythrocytes

b) milk secretion

c) T-lymphocytes

d) melanocytes

Question : 4

Consider the following statements :

1. They are small, cylindrical, branched and the fibers have broad ends.
2. Special electrical junctions called “intercalated discs” are present at intervals in the fibers.
3. The muscles show undergo contractions.
4. They are involuntary muscle fibers. They are not under the control of one’s will.

a) 1, 2 and 3

b) 2 and 4

c) 1 and 2

d) 1, 2, 3 and 4

Question : 5

The force responsible for upward conduction of water against gravity comes from

a) translocation

b) respiration

c) transpiration

d) photosynthesis

Question : 6

Neurons receive signals through their __________ and send signals to other neurons through their __________.

a) end feet ... cell bodies and dendrites

b) dendrites ... receptors

c) cell bodies and dendrites ... axons

d) transmitter vesicles ... axons