The Principal Ions in Extracellular Fluid are Sodium, Chloride, And

Question

The principal ions in extracellular fluid are sodium, chloride, and
A) potassium.
B) magnesium.
C) phosphate.
D) bicarbonate.
E) iodine.

Accepted Answer

Bicarbonate is a principal ion in extracellular fluid, along with sodium and chloride, playing a key role in maintaining acid-base balance.