Cells often use ______________________ to move ions against their concentration gradient.

Question

Quizplus · Accepted Answer

Active transport is the process in which cells utilize energy (usually in the form of ATP) to move particles against their concentration gradient, from an area of low concentration to an area of high concentration. This is in contrast to simple diffusion (A) and facilitated diffusion (B), which move particles down their concentration gradient. Osmosis (D) refers specifically to the movement of water molecules across a selectively permeable membrane, and cilia (E) are structures found on the surface of some cells that are involved in movement but not transport of ions.

Cells Often Use ______________________ to Move Ions Against Their Concentration