Which of the following is the purpose of lung surfactant?
A) Destroy and remove foreign material from the alveoli.
B) Aid in the facilitated diffusion of oxygen across the alveolar membrane.
C) Decrease the surface tension of water in the alveoli.
D) Aid in the facilitated diffusion of carbon dioxide and oxygen across the alveolar membrane.

Question

Quizplus · Accepted Answer

Lung surfactant reduces the surface tension of water in the alveoli, which prevents the collapse of small air sacs (alveoli) in the lungs. This allows for better gas exchange during breathing.

Which of the Following Is the Purpose of Lung Surfactant