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. Oxygen moves from the alveoli into the capillaries because there is a higher concentration of oxygen in the alveoli than in the capillaries. Carbon dioxide moves from the capillaries to the alveoli because there is a higher concentration of carbon dioxide in the capillaries than in the alveoli. This movement occurs due to the principle of diffusion, where particles move from an area of high concentration to an area of low concentration.

What Principle Causes the Exchange of Oxygen and Carbon Dioxide