What is the major cation in the ECF (extracellular fluid)?
A) sodium
B) calcium
C) chloride
D) potassium
E) glucose

Question

What is the major cation in the ECF (extracellular fluid)?
A) ​sodium
B) ​calcium
C) ​chloride
D) ​potassium
E) ​glucose

Quizplus · Accepted Answer

Sodium is the main cation in the extracellular fluid (ECF), making up approximately 90% of the total positive charge in this fluid. Its concentration is tightly regulated by various homeostatic mechanisms to maintain proper fluid balance and cellular function.

What Is the Major Cation in the ECF (Extracellular Fluid)