The Principal Ions in Intracellular Fluid are Magnesium, Phosphate And

Question

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

Accepted Answer

Potassium is the most abundant ion in intracellular fluid, with concentrations ranging from 120-150 mM. Magnesium and phosphate are also present in significant amounts, but not as abundant as potassium. Sodium, chloride, bicarbonate and calcium are mainly found in extracellular fluid.