Human Physiology UPSC Questions

Biology

Human Physiology MCQ Questions


7.
What is the oxygen carrying capacity of haemoglobin in 100 mL of oxygenated blood?
A.
1 mL
B.
3 mL
C.
5 mL
D.
7 mL
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ANSWER :
C. 5 mL
8.
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
9.
Which centre in the brain regulates respiratory rhythm?
A.
Hypothalamus
B.
Pneumotaxic centre
C.
Cerebellum
D.
Medulla
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ANSWER :
D. Medulla
10.
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
11.
What is the importance of using Pneumococcal Conjugate Vaccines in India?
1. These vaccines are effective against pneumonia as well as meningitis and sepsis.
2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced.
3. These vaccines have no side effects and cause no allergic reactions.
Select the correct answer using the code given below:
UPSC - 2020
A.
1 only
B.
1 and 2 only
C.
3 only
D.
1, 2 and 3
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ANSWER :
B. 1 and 2 only
12.
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