Human Physiology UPSC Questions

Biology

Human Physiology MCQ Questions


1.
What is the primary site for the exchange of gases in human beings?
A.
Trachea
B.
Bronchi
C.
Alveoli
D.
Pharynx
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ANSWER :
C. Alveoli
2.
Which structure prevents the entry of food into the larynx during swallowing?
A.
Glottis
B.
Epiglottis
C.
Pharynx
D.
Trachea
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ANSWER :
B. Epiglottis
3.
What is the average tidal volume in a healthy human?
A.
1000 mL
B.
1500 mL
C.
500 mL
D.
750 mL
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ANSWER :
C. 500 mL
4.
Which of the following statements is/are correct regarding vegetative propagation of plants?
1.Vegetative propagation produces clonal population.
2.Vegetative propagation helps in eliminating the virus.
3.Vegetative propagation can be practiced most of the year.
Select the correct answer using the code given below.

UPSC - 2014

A.
1 only
B.
2 and 3 only
C.
1 and 3 only
D.
1, 2 and 3
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ANSWER :
C. 1 and 3 only
5.
Which muscle's contraction increases thoracic volume during inspiration?
A.
Diaphragm
B.
Intercostal
C.
Abdominal
D.
Pectoral
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ANSWER :
A. Diaphragm
6.
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