What is diffusion and facilitated diffusion?

Diffusion: Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical...

The use of Proteins.

Substances enter a cell through the cell membrane

Facilitated diffusion involves a carrier protein (or channel).

The difference between diffusion and facilitated diffusion is that facilitated diffusion is that the molecules pass through special protein channels.