Marks the true statement among the following with reference to normal breathing

Options

A. Inspiration is a passive process whereas expiration is active
B. Inspiration is a active process whereas expiration is passive
C. Inspiration and expiration are active processes
D. Inspiration and expiration are passive processes

Answer

B

Explanation

Inspiration is the process by which fresh atmospheric air enters into the alveoli of the lungs. It is an active process and is brought out by the activity of respiratory muscles. Expiration is the process by which foul air expelled out of the lungs. It is a normal passive process.