A fall in glomerular filtration rate (GFR) activates

(A)juxtaglomerular cells to release renin
(B)adrenal cortex to release aldosterone
(C)adrenal medulla to release adrenaline
(D)posterior pituitary to release vasopressin

The NCERT line that answers it

Verbatim line

A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release **renin** which converts angiotensinogen in blood to angiotensin I and further to angiotensin II.

Chapter: Excretory Products and their Elimination
Section: 16.5 REGULATION OF KIDNEY FUNCTION
Page: 7
Words matched: 29 of 29

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin', which directly matches the MCQ's correct answer that a fall in GFR activates juxtaglomerular cells to release renin.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

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Question text is reproduced from the published NEET 2012 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.