NEET UG BIOLOGY MCQ: BREATHING AND EXCHANGE OF GASES

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Analyzing +4 | -1

Read following statements carefully and select the option containing all correct statements.

a.

{pO}_2

of atmospheric air is more than

{pO}_2

of alveolar air.

b. Diffusion of gases through respiration membrane depends upon their solubility and partial pressure.

c. Intrapleural pressure during normal inspiration is less than intra pulmonary pressure.

d. Decrease in activity / frequency of pneumotaxic centre increases breathing rate.

View answer and explanation

Correct option: A

a, b and c

Option A (a, b and c) is correct because atmospheric air has a higher

{pO}_2

than alveolar air, gas diffusion depends on solubility and partial pressure, and intrapleural pressure is less than intrapulmonary pressure during inspiration.

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