Question

During quiet breathing, inhalation is whereas exhalation is

• A. passive; passive
• B. passive; active
• C. active; active
• D. active; passive

Answer 1

The correct option is D active; passive

During quiet breathing, the predominant muscle of respiration is the diaphragm, expiration during quiet breathing is a passive phenomenon & inhalation is active.

So, the correct option is 'active; passive'.