Solved UPSC CDS/OTA Question
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Q · Excretory Systemmedium · 45s
The hormone that regulates water reabsorption and urine concentration is:
TopicExcretory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Antidiuretic hormone (ADH), released by the posterior pituitary, increases the permeability of the collecting ducts to water by inserting aquaporin channels. This allows water to be reabsorbed into the bloodstream, reducing urine volume and concentrating the urine.
Final Answer: Option B - ADH (vasopressin)