Which of these describes diffusion?

Question

a
The active transport of particles into a cell
b
The active transport of particles out of a cell
c
The net movement of any type of molecule from a region of higher concentration to a region of lower concentration
d
The net movement of any type of molecule from a region of lower concentration to a region of higher concentration

Answer 1

The correct answer is:

c. The net movement of any type of molecule from a region of higher concentration to a region of lower concentration.

Diffusion is a passive process where molecules move spontaneously down their concentration gradient.