Talk about mineral salts

NaCl, KCl, MgSO4...present in ionic form. Hydrated entities (surrounded by H2O) Their balance leads to: -pH equivalence -osmotic pressure [ions] in cell != [ions] outside/ interstitial fluid. They have physiological roles: -membrane permeability -cell division -muscular contraction (Ca) -intracellular signaling-nerve impulse generation and propagation- Enzymatic activities (Fe for Hb)