Which statement describes how diffusion works?

Question

Molecules always move from inside of the cell to outside of the cell.
Molecules always move from areas of high concentration to low concentration.
Molecules always move from areas of low concentration to high concentration.
Molecules always move from of outside the cell to inside of the cell.

Answer 1

The correct statement describing how diffusion works is:

Molecules always move from areas of high concentration to low concentration.

This is the fundamental principle of diffusion, where substances naturally move to equalize concentrations on either side of a membrane or barrier.