SSC MTS EXAM

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: -Facilitated Diffusion Process Solutes moving through solution or a gas move randomly along a concentration gradient until there are equal numbers of particles in the two areas.

Detailed explanation-3: -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-4: -Facilitated Diffusion Requires Membrane Carrier Proteins Facilitated diffusion is also calledcarrier-mediated diffusion because a substance transported in this manner diffuses through the membrane with the help of a specific carrier protein. That is, the carrierfacilitates diffusion of the substance to the other side.