Does Diffusion Require Energy?

Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.

Does diffusion or osmosis require energy?

Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur.

Does diffusion involve energy?

Diffusion is the movement from a high concentration of molecules to a low concentration of molecules. Molecules can diffuse across membranes through the phospholipid bilayer or using a special protein. Either kind of diffusion does not need energy from the cell.