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What hormones does the heart secrete?

Answer 1

Atrial Natriuretic Peptide (ANP)

The ANP is secreted from the atrial walls when they become stretched. During heart failure, the atrial walls become very much stretched and release large amount of ANP; much higher than the normal level. In case of severe heart failure, the circulating level of ANP in the blood may increase tenfold.

FUNCTION:
The ANP increases sodium excretion by kidneys, and reduces blood pressure.

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Answer 2

Dylan Andrews

The heart does not secrete hormones. It releases atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.