The cell membrane's function is to.. O allow nutrients in, and send wastes out of the cell

O to control the amount of water that enters the cell

O to block all nutrients from entering the cell

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

answer: b

coz red blood cells marrow and circulates the body for 120 days.