The cell membrane contains channels and pumps that move materials from 1 side to the other. what are these channels and pumps made of.
a. bilipids
b. carbohydrates
c. lipids
d. proteins

I believe proteins would be the correct answer, but of course I just learnt this stuff 2 weeks ago. xD

Option- (D) Proteins.

Explanation:

Intrinsic Protein making up the pathway for material exchange process:The cell membrane contains channels made up of proteins mainly as the, phospho-lipids are also present in the structure of the membrane but the phospho-lipid have a hydrophobic head and hydro-philic tail which is present inside the membrane. The current flow inside the membrane occurs and is detected by various instruments which are applied on the membrane. As there are channels are present on the membrane, as the membranes are opened and closed on the flow of electric charges flow, as the hols are traversing the lipid layer.The proteins are present in larger number inside the membrane to make up the function of exchange inside the body.

Heatamount of salt . . .