Most body potassium (K⁺) is located intracellularly.Through what transport mechanism would additional K⁺ move from the extracellular compartment to the intracellular compartment?
A)Osmosis
B)Active transport pump
C)Facilitated diffusion
D)Filtration

Question

Quizplus · Accepted Answer

Most of the potassium in the body is located intracellularly, and additional potassium ions are transported into the cell by active transport pumps. These pumps require energy to move ions against their concentration gradient, and in the case of potassium, the pump uses ATP to move potassium ions from the extracellular compartment into the intracellular compartment. Osmosis is the passive movement of water across a selectively permeable membrane, facilitated diffusion involves the movement of solutes from an area of high concentration to an area of low concentration with the help of protein carriers, and filtration involves the movement of fluids and solutes across a membrane under pressure. None of these mechanisms are primarily responsible for the movement of potassium ions into cells.

Most Body Potassium (K⁺) Is Located Intracellularly