True statements about ions composition in body: (A) Intracellular & Extracellular ions compositions are same, (B) Phosphorus and Mg++ are major ions intracellularly, (C) Na+, Cl- principal ions in E.C.F., (D) Kidney tightly regulates Na+, K+, Cl- composition
Answer is C. Electrolyte constitutes about 7% of total body weight. In ECF Na, Cl is the principle ions.Whereas K is more intracellularly. (REF TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO 62,22)