Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by ________.
A) active transport
B) filtration
C) diffusion
D) osmosis

Question

Quizplus · Accepted Answer

Oxygen and carbon dioxide diffuse across the membranes of capillaries and alveoli in the lungs and across the membranes of cells in the body. Diffusion is the movement of molecules from areas of higher concentration to areas of lower concentration, and it does not require energy input from the cell.

Oxygen and Carbon Dioxide Are Exchanged in the Lungs and Through