What principle causes the exchange of oxygen and carbon dioxide between the capillaries and the alveoli?
A)absorption
B)diffusion
C)secretion
D)active transport

Question

Quizplus · Accepted Answer

The principle that causes the exchange of oxygen and carbon dioxide between the capillaries and the alveoli is diffusion, which is the movement of molecules from an area of high concentration to an area of low concentration. Oxygen diffuses from the alveoli into the capillaries, where it can be transported throughout the body, and carbon dioxide diffuses from the capillaries into the alveoli, where it can be exhaled out of the body.

What Principle Causes the Exchange of Oxygen and Carbon Dioxide