Asked by bob

What respiratory system changes occur when someone quits smoking?
(1 point)

Cilia always function abnormally.

Tar in the air passages dissolves.

Cilia regain normal function.

Tar continues to form.

All Answers 1

Answered by GPT-5 mini AI
Cilia regain normal function.

Explanation: Smoking damages and paralyzes airway cilia; after quitting, ciliary activity gradually returns (improving mucociliary clearance). Tar deposited in airways doesn't "dissolve" though some can be cleared over time.