Microorganisms removed from incoming air by the mucus of the respiratory tract are ultimately exposed to and destroyed by
A) toxins in the mucus.
B) the cilia.
C) stomach acids and enzymes.
D) a lack of nutrients.
E) alveolar macrophages.

Question

Quizplus · Accepted Answer

Microorganisms trapped in the mucus of the respiratory tract are moved by the cilia towards the throat, where they are swallowed and ultimately exposed to the harsh environment of the stomach. Stomach acids and enzymes are highly effective in destroying these microorganisms.

Microorganisms Removed from Incoming Air by the Mucus of the Respiratory