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Select the correct statements:
Option: 1
Angiotensin II is a powerful vasodilator
Option: 2
Counter current pattern blood flow is not observed in vasa recta
Option: 3
Reduction in Glomerular filtration rate activates JG cells to release renin.
Option: 4
Atrial natriuretic Factor increases the blood pressure
Answers (1)
- Reduction in GFR causes stimulation of RAAS
- RAAS is Renin Angiotensin Aldosterone System
- Low GFR activates JG cells to secrete Renin
- Renin then forms Angiotensin I and II
- Angiotensin II is a potent vasoconstrictor
- This causes increase in blood pressure
- Angiotensin II also causes release of Aldosterone that controls water and electrolyte balance
- Thus GFR is increased
- ANF from heart controls the incresed GFR
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