Three Individuals,each Weighing 55 Kg and Each Having a Plasma

Multiple Choice

Three individuals,each weighing 55 kg and each having a plasma [Na⁺] of 145 mEq/L,receive infusions of different solutions.Individual A receives 1 L of isotonic NaCl (290 mOsm/kg H₂O) ; individual B receives 1 L of a mannitol solution (290 mOsm/kg H₂O) ; and individual C receives 1 L of a 5% dextrose in water (D₅W) solution (290 mOsm/kg H₂O) .Assuming that there is no urine output,and after complete equilibration of the extracellular and intracellular fluid,which of these individuals will have a lower plasma [Na⁺]?

A) Individual A (NaCl infusion) .
B) Individual B (mannitol infusion) .
C) Individual C (D₅W infusion) .
D) Individuals A,B,and C will have the same plasma [Na⁺].