<prompt> Most Impoant hormone responsible for volume maintenance?AldosteroneAngiotensinADHRenin  <response>: Ans. is c i.e., ADHRel Principles of medical physiology p. 412; Ganong 2,he p. 7041Despite its effect on Na and water reabsorption, aldosterone k a weak regulator of boily Na and water balance, the majorregulator being the thirst-ADH mechanism, Aldosterone k the sole regulator of external potassium balance.- Principles of medical physiology 