The part of the nephron that creates a concentration gradient in the kidney medulla is: MCQ with Answer and Explanation

The part of the nephron that creates a concentration gradient in the kidney medulla is:
A. Bowman's capsule
B. Distal convoluted tubule
C. Proximal convoluted tubule
D. Loop of Henle
Answer: Option D
Solution (By JKSSB Mock Tests)
The loop of Henle, especially the descending limb (permeable to water) and ascending limb (impermeable, active salt transport), creates an osmotic gradient in the medulla. This countercurrent multiplier system enables the kidney to produce concentrated or dilute urine depending on hydration status. ADH acts on the collecting duct to utilize this gradient.

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Correct Answer: Option D


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