<prompt> Which one of the following statements regarding water re-absorption in the tubules is True?The bulk of water re-absorption occurs secondary to Na re-absorptionMajority of facultative re-absorption occurs in proximal tubuleObligatory re-absorption is ADH dependent20 of water is always re-absorbed irrespective of water balance  <response>: Changes in sodium re-absorption significantly influence the re-absorption of water. Ref: Textbook of Medical Physiology By Guyton, 10th Edition, Page 299 