LIFE SCIENCE

Detailed explanation-1: -In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into (or out of) the cell by moving down it.

Detailed explanation-2: -For instance, facilitated diffusion by channel proteins (e.g. transmembrane channels) is one that uses membrane proteins that act as a pore in the lipid bilayer.

Detailed explanation-3: -Facilitated diffusion of solutes occurs through phospholipid pores in the membrane. Facilitated diffusion requires energy to drive a concentration gradient. There is only one kind of protein pore for facilitated diffusion. Facilitated diffusion of solutes may occur through channel or transport proteins in the membrane.