The most abundant extracellular cation is?: (A) Chloride, (B) Sodium, (C) Calcium, (D) Potassium
Answer is B. Potassium is the most abundant cation in intracellular fluid.
Phosphate is the most abundant intracellular anion.
Sodium is the most abundant extracellular cation.
Chloride is the most abundant extracellular anion.