The sodium-potassium pump regulates the amount of sodium and potassium inside of cells, particularly nerve and muscle cells. in this process, an atp is burned, causing three sodium ions to be pumped out and exchanged for two potassium ions, which are pumped in by a membrane protein. both ions go against their concentration gradients. the sodium-potassium pump is an example of a) phagocytosis. b) passive transport. c) active transport. d) facilitated diffusion.

The correct answer is C) active transport.

Active transport is one of the transport systems of the cell. It requires energy to transport substances across the cell membrane against the concentration gradient, that is, from the region of low concentration to the region of high concentration.

It usually gets energy by ATP hydrolysis.

Examples may include sodium-potassium pump, GLUT transporters in intestinal cells et cetera.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.