Which statement is NOT true of the alveoli of the lungs?
A)They are surrounded by pulmonary capillaries.
B)Diffusion of gases takes place across only six layers of cells.
C)Tissue fluid lining the alveoli permits the diffusion of gases.
D)Surfactant permits the inflation of alveoli by decreasing their internal surface tension.

Question

Quizplus · Accepted Answer

Diffusion of gases takes place across only two layers of cells, not six. The two layers include the wall of the alveolus and the wall of the capillary that surrounds it.

Which Statement Is NOT True of the Alveoli of the Lungs