Calcium ions are normally in higher concentrations outside most living cells than within cells. Which of the following processes is most likely responsible for this condition?
A) simple diffusion
B) facilitated diffusion
C) osmosis
D) active transport

Question

Quizplus · Accepted Answer

Active transport is the process in which energy is required to move molecules or ions across a cell membrane against their concentration gradient, from an area of low concentration to an area of high concentration. This process is responsible for maintaining a higher concentration of calcium ions outside the cell membrane compared to inside the cell.

Calcium Ions Are Normally in Higher Concentrations Outside Most Living