ANP

Question 1

Released when

Answer 1

From atrial myocytes, in response to high blood volume and atrial pressure.

Question 2

What does ANP cause

Answer 2

1) Generalized vascular relaxation and low Na+ reabsorption at the medullary collecting tubule.
2) constricts efferent renal arterioles and dilates afferent arterioles via cGMP, promoting diuresis and contributing to the “escape from aldo”