Free Breathing And Exchange Of Gases (Daily Quiz: 11) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

A normal man at rest inspires and expires about 500 millilitres of air, this amount is known as –

(a) tidal volume of air

(b) reserve volume of air

(c) complemental volume of air

(d) residual volume of air

Question-2

If $O_{2}$ concentration in tissues were almost as high as at the respiratory surface

(a) haemoglobin would combine with more $O_{2}$ to the tissues

(b) oxyhaemoglobin would not dissociate to supply $O_{2}$ to the tissues

(c) oxyhaemoglobin would dissociate to supply $O_{2}$ to the tissues

(d) $CO_{2}$ will interfere with $O_{2}$ transport.

Question-3

Partial pressure of oxygen in inspired and expired air is ……. and ……. mm of Hg.

(a) 158, 40

(b) 100, 46

(c) 158, 90

(d) 100, 95

Question-4

Although much $CO_2$ is carried in blood, yet blood does not become acidic, because

(a) blood buffers play an important role in $CO_2$ transport.

(b) it combines with water to form carbonic acid ($H_2CO_3$) which is neutralized by $Na_2CO_3$ .

(c) it is absorbed by the leucocytes

(d) it is continuously diffused through tissues and is not allowed to accumulate.

Question-5

In alveoli of the lungs, the air at the site of gas exchange, is separated from the blood by

(a) alveolar epithelium and capillary endothelium

(b) alveolar epithelium, capillary endothelium and tunica adventitia

(c) alveolar epithelium only

(d) alveolar epithelium, capillary endothelium, a thin layer of tunica media and tunica adventitia