First slide

Regulation of Kidney Function

Question

ANF is not involved in

Moderate

A

decreasing the blood pressure
B

constricting the blood vessels
C

inhibiting the secretion of aldosterone
D

suppressing the reabsorption of Na⁺

Solution

ANF is a vasodilator. It does not constrict the blood vessels.
It suppresses reabsorption of Na⁺ and water in proximal tubule and collecting duct; inhibits secretion of aldosterone and ADH. It increases excretion of Na⁺ in urine (natriuresis); increases urine output (diuresis) and thus decreases blood volume and blood pressure.

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