Which one of the following statements regarding water re-absorption in the tubules is True?
Changes in sodium re-absorption significantly influence the re-absorption of water. Ref: Textbook of Medical Physiology By Guyton, 10th Edition, Page 299
The bulk of water re-absorption occurs secondary to Na+ re-absorption
Majority of facultative re-absorption occurs in proximal tubule
Obligatory re-absorption is ADH dependent
20% of water is always re-absorbed irrespective of water balance