The alveoli contain small amounts of fluid to
A) prevent friction during respiration.
B) permit gas exchange.
C) decrease surface tension.
D) ease the movement of the alveoli against surrounding tissues.

Question

Quizplus · Accepted Answer

The small amount of fluid in the alveoli allows for efficient gas exchange between the air and the bloodstream. The fluid helps to keep the alveolar walls moist, which is necessary for the diffusion of gases across the membrane. It also helps to maintain a thin film of fluid over the surface of the alveoli, reducing surface tension and preventing the collapse of the smaller airways.

The Alveoli Contain Small Amounts of Fluid to