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Which of these hormones reduce blood pressure?

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in Biology – Class 11 by (272k points)
Which of these hormones reduce blood pressure?

(a) Atrial natriuretic factor

(b) Adrenaline

(c) Noradrenaline

(d) Somatotropin

I have been asked this question in a national level competition.

The query is from Chemical Control and Coordination topic in division Chemical Control and Coordination of Biology – Class 11

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The correct choice is (a) Atrial natriuretic factor

The explanation is: Atrial natriuretic factor or ANF is secreted by the walls of the atria of the heart. Its effect is to dilate blood vessels and hence decrease blood pressure. Adrenaline and noradrenaline increase blood pressure.

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