If anyone can clarify the following that would be greatly appreciated
Would you say that facilitated diffusion is the passive, net movement of particles from a region of high concentration to a region of low concentration, via
transmembrane proteins?
Or do you have to specify carrier/channel proteins?
Also, cholesterol helps stabilise the phospholipid bilayer by maintaining its rigidity at high temperatures, whilst it maintains the cell membrane's fluidity at low temperatures. If it asks for an explanation, I would say that at high temperatures, it decreases the membrane's permeability to polar substances, while it increases the membrane's permeability to polar substances at low temperatures.
Thanks