Pharmacology The site of action of the loop diuretic furosemide is: A Thick ascending limb of loop of Henle B Descending limb of loop of Henle C Proximal convoluted tubule D Distal convoluted tubule 💡 Explanation The site of action of the loop diuretic furosemide is: ✓ Correct Answer: A. Thick ascending limb of loop of Henle