Question

what is facilitated diffusion?

Answer 1

When molecules are transported in or out of the limiting boundary (consider the plasma membrane in this case) with the help of other chemicals or proteins (carrier proteins) , such a diffusion is called facilitated diffusion.

Answer 2

A N S W E R :-

Facilitated diffusion is the passive movement of molecules across the cell membrane via the aid of a membrane protein

☞It is utilised by molecules that are unable to freely cross the phospholipid bilayer (e.g. large, polar molecules and ions).

☞This process is mediated by two distinct types of transport proteins – channel proteins and carrier proteins

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