Diffusion is
A) one type of active transport.
B) the movement of water across a cell membrane.
C) the movement of molecules from an area of high concentration to an area of low concentration.
D) the movement of molecules across a membrane, assisted by proteins embedded in the membrane.

Question

Quizplus · Accepted Answer

Diffusion is defined as the movement of molecules from an area of high concentration to an area of low concentration. It does not require the use of energy or any special proteins. It is a passive process that works to equalize the concentration of molecules on either side of a membrane or other barrier.

Diffusion Is