Solved UPSC CDS/OTA Question
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Q · Excretory Systemmedium · 45s
What is the osmolarity of the fluid at the tip of the Loop of Henle in a healthy human kidney?
TopicExcretory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The inner medullary interstitium at the hairpin loop base reaches ~1200 mOsm/L in humans, creating the high osmotic gradient necessary for water reabsorption in the collecting ducts under ADH.
Final Answer: Option D - ~1200 mOsm/L