The function of surfactant is to:
A) transport oxygen from the air to the blood.
B) transport carbon dioxide from the blood to the air.
C) prevent each alveolus from collapsing as air moves in and out during respiration.
D) trap foreign particles as they enter the bronchial tree.

Question

Quizplus · Accepted Answer

Surfactant is a phospholipid that lines the alveoli and reduces surface tension, preventing the collapse of each alveolus as air moves in and out during respiration. It does not transport oxygen or carbon dioxide, nor does it trap foreign particles.

The Function of Surfactant Is To