Final answer:
The hormone that lowers blood pressure is atrial natriuretic peptide (ANP). ANP is released by cells in the atrium of the heart in response to high blood pressure. It acts as a vasodilator and prevents sodium reabsorption by the renal tubules, which decreases water reabsorption and lowers blood pressure.
Step-by-step explanation:
The hormone that lowers blood pressure is atrial natriuretic peptide (ANP). ANP is released by cells in the atrium of the heart in response to high blood pressure. It acts as a vasodilator and prevents sodium reabsorption by the renal tubules, which decreases water reabsorption and lowers blood pressure.