Which of the Following is the Chief Extracellular Cation

Question

Which of the following is the chief extracellular cation?
A) Chloride
B) Calcium
C) Sodium
D) Potassium

Accepted Answer

Sodium is the chief extracellular cation, meaning it is the most abundant positively charged ion outside of cells in the body. Chloride, calcium, and potassium are also important ions in the body, but they are not the primary extracellular cation.