All of these things can block a bronchus and cause incomplete expansion or collapse of a lung except:
A)stridor.
B)mucus.
C)a tumor.
D)a foreign body.

Question

Quizplus · Accepted Answer

Stridor is a harsh, high-pitched sound heard during breathing caused by obstruction of the air passages, but it is not a cause of bronchial blockage. Mucus, a tumor, and a foreign body can all block a bronchus and cause incomplete expansion or collapse of a lung.

All of These Things Can Block a Bronchus and Cause