Facilitated Diffusion — Definition & Types

In both forms of diffusion no input of energy is needed to move the molecules.

In both forms of diffusion a ligand is needed in order to open up a channel to allow for the passage of molecules from high to low concentration.

In both forms of diffusion proteins are required in order to allow for the passage of molecules across the plasma membrane.

In both forms of diffusion the molecules move down their concentration gradient from areas of high concentration to low concentration.