Which one of the following statements regarding water re-absorption in the tubules is True?

A. The bulk of water re-absorption occurs secondary to Na+ re-absorption

B. Majority of facultative re-absorption occurs in proximal tubule

C. Obligatory re-absorption is ADH dependent

D. 20% of water is always re-absorbed irrespective of water balance

Correct Answer: The bulk of water re-absorption occurs secondary to Na+ re-absorption

Description: Changes in sodium re-absorption significantly influence the re-absorption of water. Ref: Textbook of Medical Physiology By Guyton, 10th Edition, Page 299

Category: Physiology

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