Solved UPSC CDS/OTA Question
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Q · Excretory Systemmedium · 45s
The juxtaglomerular apparatus regulates renal blood flow and GFR by releasing:
TopicExcretory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The juxtaglomerular cells in the afferent arteriole secrete renin in response to decreased renal perfusion pressure, sympathetic stimulation, or low NaCl at macula densa. Renin initiates the renin–angiotensin–aldosterone system to restore blood pressure and GFR.
Final Answer: Option A - Renin