Question

Answer Explain how the exchange of gases occurs across the plasma membrane of cells.​

Answer 1

Answer:

Gas exchange occurs in microscopic dead-end air-filled sacs called alveoli, where a very thin membrane (called the blood-air barrier) separates the blood in the alveolar capillaries (in the walls of the alveoli) from the alveolar air in the sacs.

Explanation:

Answer 2

Answer:

The exchange of gases occurs across the plasma membrane of cells through diffusion.

Explanation:

The basic mechanism of gas exchange is diffusion across a moist membrane. Diffusion is the movement of molecules from a region of greater concentration to a region of lesser concentration, in the direction following the concentration gradient.