Question

How is facilitated diffusion different from diffusion?

Answer 1

Definition

* Facilitated diffusion is the movement of molecules across the plasma membrane across the concentration gradient with the help of transport proteins.

* Diffusion is the movement of molecules across the plasma membrane across the concentration gradient.

Components

* In diffusion the integral proteins of the membrane play no part in the movement of substances.

* In facilitated diffusion the integral proteins like carrier proteins, channel proteins and gated channel proteins are used for the movement.

Summary:

Difference

Criteria	Diffusion	Facilitated diffusion
Definition	The movement of molecules across the plasma membrane across the concentration gradient.	The movement of molecules across the plasma membrane across the concentration gradient with the help of transport proteins.
Components	Integral proteins of the membrane play no part in the movement of substances.	The integral proteins like carrier proteins, channel proteins and gated channel proteins are used for the movement.