The primary ECF cation is ____, and the primary ICF cation is ____.
A)K+; Na+
B)K+; Ca₂₊
C)Ca₂₊; Na+
D)Na+; K+
E)Na+; Ca₂₊

Question

Quizplus · Accepted Answer

The primary cation in the ECF (extracellular fluid) is Na+ (sodium), while the primary cation in the ICF (intracellular fluid) is K+ (potassium). Therefore, the correct answer is D, Na+ for ECF and K+ for ICF. The other choices are incorrect because Ca2+ is not the primary cation in either ECF or ICF, and Na+ is not the primary cation in ICF.

The Primary ECF Cation Is ____, and the Primary ICF