In the presence of vasopressin the greatest fraction of filtered water is reabsorbed in which pa of the nephron?
The proximal tubule is responsible for reabsorbing ~60% of filtered water irrespective of the presence or abscence of vassopressin. Ref: Harrisons principles of internal medicine, 18th edition, chapter: 277.
Proximal tubule
Distal tubule
Loope of Henle
Collecting duct