Which mechanism enables substances to move through the cell membrane from a region of higher concentration to a region of lower concentration without any energy expenditure?

Question

Quizplus · Accepted Answer

Simple diffusion is a process in which substances move from a region of high concentration to a region of low concentration without any energy expenditure, and it is facilitated by the cell membrane. Vesicular transport, exocytosis, and equilibrium, however, all require energy in some form.

Which Mechanism Enables Substances to Move Through the Cell Membrane