An ion moves from low to high concentration across the cell membrane because of ________.

Question

Quizplus · Accepted Answer

Active transport is the process by which ions move from an area of low concentration to an area of high concentration, against the concentration gradient. This requires the use of energy in the form of ATP, making it an active process. Diffusion and facilitated transport both involve movement of ions down their concentration gradients, without the use of energy.

An Ion Moves from Low to High Concentration Across the Cell