Which of these describes diffusion? a The active transport of particles into a cell b The net movement of any type of molecule from a region of higher concentration to a region of lower concentration c The active transport of particles out of a cell d The net movement of any type of molecule from a region of lower concentration to a region of higher concentration Question 19

Answer 1

The correct answer that describes diffusion is:

b 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 that occurs without the need for energy input, where molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.