Human Physiology UPSC Questions

Biology

Human Physiology MCQ Questions


7.
How is most of the carbon dioxide transported in the blood?
A.
Dissolved in plasma
B.
As bicarbonate
C.
As carbonic acid
D.
As carbamino-haemoglobin
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ANSWER :
B. As bicarbonate
8.
Which centre in the brain regulates respiratory rhythm?
A.
Hypothalamus
B.
Pneumotaxic centre
C.
Cerebellum
D.
Medulla
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ANSWER :
D. Medulla
9.
What happens when pCO2 increases in blood?
A.
Oxygen binding increases
B.
Respiration decreases
C.
Respiratory rate increases
D.
No effect
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ANSWER :
C. Respiratory rate increases
10.

Consider the following pairs: Which of the pairs given above is/are correctly matched?

Vitamin Deficiency disease
1) Vitamin C Scurvy
2) Vitamin D Rickets
3) Vitamin E Night blindness

UPSC - 2014

A.

1 and 2 only

B.

3 only

C.

1, 2 and 3

D.

None

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ANSWER :

A. 1 and 2 only

11.
Which respiratory volume is measured after a normal inspiration followed by maximal expiration?
A.
Tidal Volume
B.
Expiratory Reserve Volume
C.
Vital Capacity
D.
Residual Volume
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ANSWER :
C. Vital Capacity
12.
Which disorder is caused by damage to alveolar walls due to smoking?
A.
Asthma
B.
Bronchitis
C.
Emphysema
D.
Pneumonia
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ANSWER :
C. Emphysema