The most abundant cation in the intracellular fluid is:
A) potassium.
B) sodium.
C) magnesium.
D) calcium.

Question

Quizplus · Accepted Answer

Potassium is the most abundant cation in the intracellular fluid, with a concentration that is approximately 30 times higher than that of sodium. This is due to the fact that the plasma membrane of most cells contains potassium channels but only a limited number of sodium channels, allowing for more potassium ions to enter the cell than sodium ions to leave.

The Most Abundant Cation in the Intracellular Fluid Is