Facilitated diffusion is a type of Passive transport.
Diffusion of solutes through transport proteins in the plasma membrane is referred to as facilitated diffusion.
Passive transport is a subset of facilitated diffusion.
Because the solution is traveling down the concentration gradient, assisted diffusion is still passive transport even when it incorporates transport proteins.
Passive transport includes both aided diffusion and simple diffusion. They transport compounds from a high-concentration area to a low-concentration area.
The former, however, differs from the latter in the manner in which molecules pass the membrane.
Membrane proteins are needed for facilitated diffusion to move biological molecules.
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