"which theory suggests that input from touch fibers competes with input from pain receptors, possibly preventing pain messages from reaching the brain? "

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

i think its y= -4x-14

answer; both surfaces of the membrane are nonpermeable

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.