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When the walls of the atria are stretched by increased blood volume or blood pressure, the cells of the atria produce ANP (atrial natriuretic peptide). ANP's main function is to decrease the reabsorption of sodium ions (by the kidneys) in order to increase the elimination of water (in urine), and decrease blood volume and blood pressure. I'm not sure how much you've studied as far as the endocrine system goes, but it's basically the antagonist to the hormone Aldosterone.

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11y ago
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10y ago

A brain natriuretic peptide also known as BNP, is an amino acid which is released through ones hearts ventricles. It occurs when the muscles in the heart are over stretched.

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8y ago

An atrial natriuretic peptide is a strong vasodilatory, peptide hormone, secreted by the cardiac muscle cells.

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Q: What does a brain natriuretic peptide do?
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