Although the Extracellular Environment Has a High Sodium Ion Concentration

Multiple Choice

Although the extracellular environment has a high sodium ion concentration and the intracellular environment has a high potassium ion concentration, both must be neutralized by negatively charged molecules.In the extracellular case, what is the principal anion?

A) HCO₃⁻
B) Cl⁻
C) PO₄³⁻
D) OH⁻