<prompt> The mechanism by which water is reabsorbed from proximal convoluted tubule isActive transportPassive transportFacilitated diffusionOsmosis  <response>: Maximum of filtered water 60-70 is reabsorbed in the proximal tubule, with or without Vasopressin. This is independent of the fluid and electrolyte status of the body and is caused by the osmotic gradient created by Na reabsorption. 