Question

Which of the following statements is correct w.r.t normal breathing?

• A. inspiration is a passive process while expiration is an active process
• B. Inspiration is an active process while expiration is a passive process
• C. Inspiration and expiration are active processes
• D. Inspiration and expiration are passive processes

Answer 1

The correct option is B

Inspiration is an active process while expiration is a passive process

This involves the expenditure of energy during the contraction of the intercostal muscles.