Electrolytes are profoundly affected by kidney problems. There must be a balance between ECF and ICF to maintain homeostasis. A change in the number of ions or in the amount of fluid will cause a shift in one direction or the other. ___________ and ____________ are primary ECF ions. ____________ and ___________ are primary ICF ions.

a) Sodium, Chloride; Potassium, Calcium
b) Chloride, Bicarbonate; Calcium, Sodium
c) Potassium, Calcium; Sodium, Chloride
d) Calcium, Sodium; Chloride, Bicarbonate