1) receptor proteins need to b on the outside of a cell so the cell can absorb the nutrients it needs. receptors have a specific job, membranes are semi-permeable meaning it doesn't absorb nutrients that are not needed 4 a cell to function in a healthy individual.
2) water and glucose are what most cells need to produce energy to function and produce ATP, which allows the bloodstream to deliver nutrients to the entire body.
<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>will help uh</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>