Given below are two statements.
Statement I : An increase in blood flow to the heart stimulates the secretion of ANF.
Statement II : ANF constricts the blood vessels to decrease blood pressure.
In light of the above statements, choose the correct answer from the options given below.

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Both statement I and statement II are correct.

Both statement I and statement II are incorrect.

Statement I is correct but statement II is incorrect.

Statement I is incorrect but statement II is correct.

answer is C.

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Detailed Solution

Statement I is correct but statement II is incorrect.

Statement I: "Increase in blood flow to the heart is a stimulant for the secretion of ANF." This statement is true. ANF (atrial natriuretic peptide) is a hormone secreted by the atria of the heart in response to increased blood volume and pressure. It acts to regulate blood volume and pressure by promoting vasodilation (widening of blood vessels), increasing sodium and water excretion by the kidneys, and inhibiting the secretion of renin and aldosterone.

Statement II: "ANF constricts the blood vessels to decrease blood pressure." This statement is false. ANF actually has vasodilatory effects, meaning it relaxes blood vessels, which leads to a decrease in blood pressure. By dilating blood vessels, ANF helps to decrease peripheral resistance and promote blood flow, thereby reducing blood pressure.

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