Calcium ions are normally in higher concentrations outside most living cells compared to the amounts within.Which of the following processes is most likely responsible for this condition?

Question

Quizplus · Accepted Answer

Active transport is the most likely process responsible for the higher concentration of calcium ions outside most living cells. This is because active transport requires energy and transport proteins, allowing the cell to actively move ions against their concentration gradient from an area of low concentration to an area of high concentration. This process is essential for maintaining the concentration gradient of calcium ions across the cell membrane. Simple diffusion and facilitated diffusion move ions down their concentration gradient, which would result in an equal distribution of calcium ions inside and outside the cell. Osmosis moves water molecules across the membrane, and would not directly affect the concentration of calcium ions.

Calcium Ions Are Normally in Higher Concentrations Outside Most Living