Question

Similarities Between Simple Diffusion and Facilitated Diffusion

Answer 1

Facilitated diffusion moves molecules across the cell membrane from areas of high concentration to areas of low concentration with the help of protein carriers. These protein carriers act to allow molecules through the membrane that are too large or that have the wrong composition to move through by simple diffusion.

Answer 2

Simple diffusion and facilitated diffusion both allow molecules to cross the cell membrane without any expenditure of energy by the cell.