Which hormone secreted by the atrial wall of the heart is released in response to high blood pressure to promote sodium excretion and reduce blood volume?

💡 Solution & Explanation

Atrial Natriuretic Factor is a peptide hormone released by the atrial walls of the heart in response to elevated blood pressure and atrial stretch. It promotes the excretion of sodium ions and water in urine, thereby reducing blood volume and pressure. Other hormones listed like renin and aldosterone are parts of the renin-angiotensin-aldosterone system that typically raise blood pressure and retain sodium.