Select the correct statement.

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(A) The correct answer is option $A$ because a fall in $GFR$ or blood flow activates the $JG$ cells to release renin,which initiates the Renin-Angiote

Vedclass · Accepted Answer

Reduction in Glomerular Filtration Rate activates $JG$ cells to release renin.

Vedclass · Answer

(A) The correct answer is option $A$ because a fall in $GFR$ or blood flow activates the $JG$ cells to release renin,which initiates the Renin-Angiotensin-Aldosterone System $(RAAS)$.Option $B$ is incorrect because Atrial Natriuretic Factor $(ANF)$ causes vasodilation,which decreases blood pressure.Option $C$ is incorrect because Angiotensin $II$ is a powerful vasoconstrictor,not a vasodilator,and it increases blood pressure.Option $D$ is incorrect because a counter-current pattern of blood flow is indeed observed between the loop of Henle and the vasa recta,which is essential for the concentration of urine.

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