How does facilitated diffusion differ from simple diffusion

Facilitated diffusion is the process of moving molecules across the membrane with the help of transport proteins to make the transportation of the molecules a lot easier and smoother.

Simple diffusion, however, does not have the assistance of transport proteins. Simple diffusion takes place when molecules move from a high concentration (of said molecule) to a low concentration. 

The difference: Facilitated diffusion has the help of transport proteins while simple diffusion does not. 

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