Pediatrics Fluid, Electrolyte 89538be7 Maximum concentration of plasma calcium exist as - A Complexed to phosphate B Complexed to citrate C Bound to plasma albumin D Ionized form High-Yield Explanation Plasma calcium exist as - 50 % - Biologically active ionized form 45% - Bound to plasma proteins (mainly albumin) 5% - Complexed to phosphate & citrate