Oxygen, carbon dioxide, and other small nonpolar molecules cross the plasma membrane through the process(es) of
A)osmosis.
B)diffusion.
C)endocytosis and exocytosis.
D)active transport.
E)facilitated diffusion.

Question

Quizplus · Accepted Answer

Small nonpolar molecules, such as oxygen and carbon dioxide, can easily diffuse across the plasma membrane from an area of higher concentration to an area of lower concentration. This process does not require energy or the assistance of membrane proteins, making diffusion the best choice.

Oxygen, Carbon Dioxide, and Other Small Nonpolar Molecules Cross the Plasma