Solved UPSC CDS/OTA Question
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Q · Excretory Systemmedium · 45s
Atrial natriuretic peptide (ANP) acts on the kidney to:
TopicExcretory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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ANP is released by atrial myocytes in response to atrial stretching (volume overload). In the kidney, it dilates afferent arterioles and constricts efferent arterioles, increasing GFR, and directly inhibits Na⁺ reabsorption in the collecting duct, promoting natriuresis and diuresis to reduce blood volume.
Final Answer: Option C - Increase Na⁺ excretion (natriuresis)