Question

What evolutionary hypothesis could explain the heart's role in secreting a hormone that regulates renal function? What hormone is this?

Answer 1

In response to a rise in blood pressure, the heart releases two peptides hormones namely A-type Natriuretic peptide (ANP) B-type Natriuretic Peptide (BNP).

Both hormones lower blood pressure relaxing arterioles, inhibiting the secretion of renin and aldosterone and inhibiting the reabsorption of sodium ions by the kidneys.