Changes in the respiratory system that accompany aging are
A) thickened mucus.
B) slowed swallowing reflex.
C) cilia become less active or vanish.
D) all of the above.

Question

Quizplus · Accepted Answer

All of the listed changes occur in the respiratory system with aging. Thickened mucus can make breathing more difficult, a slowed swallowing reflex can increase the risk of aspiration, and decreased cilia activity or loss of cilia can impair the airway's ability to remove foreign particles and bacteria.

Changes in the Respiratory System That Accompany Aging Are