What problems do the nervous and muscular system have on each other?

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

a symbiotic relationship with the mitochondria

. ph changes the ability of them he enzyme to dissolve in water.