The main hormone that acts on the kidneys to regulate sodium ion concentration of the extracellullar fluid (ECF) is ________.
A) ADH
B) renin
C) secretin
D) aldosterone
E) epinephrine

Question

Quizplus · Accepted Answer

Aldosterone is the main hormone that acts on the kidneys to regulate sodium ion concentration of the extracellular fluid (ECF). It promotes sodium ion reabsorption from the tubules of the kidneys, which leads to an increase in ECF volume and blood pressure. ADH regulates water balance and secretion, while renin is involved in the renin-angiotensin-aldosterone system that regulates blood pressure. Secretin regulates pancreatic and liver function, and epinephrine is a hormone that is involved in the stress response.

The Main Hormone That Acts on the Kidneys to Regulate