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A fall in glomerular filtration rate (GFR) activates:

  1. A
    Posterior pituitary to release vasopressin
  2. B
    Juxtaglomerular cells to release renin
  3. C
    Adrenal cortex to release aldosterone
  4. D
    Adrenal medulla to release adrenaline

Solution & Step-by-step Explanation

A fall in GFR activates the Juxtaglomerular (JG) cells to release renin, which initiates the Renin-Angiotensin-Aldosterone System (RAAS) to increase blood pressure and GFR.

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A fall in glomerular filtration rate (GFR) activates:
A
Posterior pituitary to release vasopressin
B
Juxtaglomerular cells to release renin
C
Adrenal cortex to release aldosterone
D
Adrenal medulla to release adrenaline

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