Vasodilation b the ANF mainly causes

Increase in blood pressure

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Initially, increase in blood pressure and finally decreases

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Decrease in the blood pressure

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None of the above

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Solution

The correct option is C Decrease in the blood pressure
ANF(Atrial natriuretic factor) is a protein hormone which is secreted by the atrial wall in response to the high blood volume and high blood pressure into the circulatory blood. ANF causes vasodilation (dilation of blood vessels) and thereby decrease the blood pressure. ANF mechanism, therefore, acts as a check on the renin-angiotensin mechanism.
So, the correct answer is 'Decrease in blood pressure'.

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