Class 11 · Excretory Products and Their Elimination

Medullary Interstitial Gradient & Urine — NEET Biology

🔥 Predicted for NEET 2027
📖 NCERT Source

Presence of such interstitial gradient helps in an easy passage of water from the collecting tubule thereby concentrating the filtrate (urine). Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed.

NCERT Biology · Class 11 · Chapter 16 · Paragraph 32
Why This May Be Tested in NEET 2027

Adjacent to a frequently-asked paragraph in the same chapter.

Practice This Concept
QuestionPredicted for NEET 2027

Which of the following conditions would lead to maximum water reabsorption from the collecting tubule?

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: A High osmolarity of medullary interstitium and presence of ADH

High medullary osmolarity and ADH together pull water out of the collecting tubule.

❓ Frequently Asked Questions
What does NCERT say about Presence such interstitial gradient?
Presence of such interstitial gradient helps in an easy passage of water from the collecting tubule thereby concentrating the filtrate (urine). Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed.
Has this concept appeared in NEET?
High probability for NEET 2027. Adjacent to a frequently-asked paragraph in the same chapter.
Which chapter is this from?
Excretory Products and Their Elimination, Class 11 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

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