Physiology General c72960d0 Predominant extracellular ions area) Na+b) K+c) Cl-d) HCO3-e) PO4- A abc B ad C bc D acd High-Yield Explanation Predominant Ions ECF- Na+, Cl-, HCO3-, Ca+2 ICF- K+, Mg+2, protein, PO4-