Question

Expanded blood volume stimulates stretch receptors in the atria of the heart causing increased secretion of

A. atrial natriuretic peptide
B. aldosterone
C. epinephrine
D. parasympathetic antagonists

Answer 1

The secretion of atrial natriuretic peptide (ANP) is increased in response to expanded blood volume and stretching of the atria of the heart. ANP acts on the kidneys to reduce the reabsorption of sodium (Na+) and water, promoting their excretion in urine. Therefore, the correct answer is A. atrial natriuretic peptide.

Step-by-step explanation:

The secretion of atrial natriuretic peptide (ANP) is increased in response to expanded blood volume and stretching of the atria of the heart.

ANP acts on the kidneys to reduce the reabsorption of sodium (Na+) and water, promoting their excretion in urine. This leads to a reduction in blood volume and blood pressure.

Therefore, the correct answer is A. atrial natriuretic peptide.