NEET 2012 Biology question

A fall in glomerular filtration rate (GFR) activates

(1)Posterior pituitary to release vasopressin
(2)Juxta glomerular cells to release reninCorrect
(3)Adrenal cortex to release aldosterone
(4)Adrenal medulla to release adrenaline

Answer: (2)

Solution

A fall in GFR/glomerular blood flow/blood pressure is sensed by the juxta glomerular apparatus (JGA). The juxta glomerular cells release renin, which converts angiotensinogen to angiotensin I and then angiotensin II (RAAS). Angiotensin II then stimulates the adrenal cortex to release aldosterone, which promotes Na+

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Question ID VK-091040