Question

ANF carries out following functions EXCEPT ..............

• A. vasodilation
• B. inhibition of renin-angiotensin mechanism
• C. vasoconstriction
• D. promotes sodium excretion

Hint:

ANF helps in regulating blood pressure by promoting vasodilation, inhibiting the renin-angiotensin mechanism, and promoting sodium excretion.

Answer 1

The Correct Option is C

Step 1: Understanding ANF.
Atrial Natriuretic Factor (ANF) is a hormone that helps regulate blood pressure and fluid balance. It promotes vasodilation, inhibits the renin-angiotensin system, and promotes sodium excretion to lower blood pressure.
Step 2: Analyzing the options.
(A) vasodilation: Correct — ANF promotes vasodilation to lower blood pressure.
(B) inhibition of renin-angiotensin mechanism: Correct — ANF inhibits the renin-angiotensin system, reducing blood pressure.
(C) vasoconstriction: Incorrect — ANF does not promote vasoconstriction; instead, it promotes vasodilation.
(D) promotes sodium excretion: Correct — ANF promotes sodium excretion by the kidneys to help reduce blood volume and pressure.
Step 3: Conclusion.
The incorrect statement is (C) vasoconstriction, as ANF promotes vasodilation, not vasoconstriction.