Question

the movement of substances from regions where their concentration is higher to regions where their concentration is lower is called: multiple choice diffusion. pumping. active transport. exocytosis. pinocytosis.

Explanation:

Diffusion is the passive movement of substances from an area of high - concentration to an area of low - concentration. Pumping involves the active movement against a concentration gradient. Active transport requires energy to move substances against their concentration gradient. Exocytosis is the process of expelling substances from the cell. Pinocytosis is a form of endocytosis where the cell takes in extracellular fluid.

Answer:

A. diffusion