The most important mineralocorticoid regulator of electrolyte concentrations in extracellular fluids is ________.
A) cortisol
B) insulin
C) glucagon
D) aldosterone

Question

Quizplus · Accepted Answer

Mineralocorticoids are a class of steroid hormones that regulate electrolyte and fluid balance in the body, particularly by promoting the reabsorption of sodium ions and the excretion of potassium ions by the kidneys. Of the mineralocorticoids, aldosterone is the most important regulator of electrolyte concentrations in extracellular fluids. It acts primarily on the distal tubules and collecting ducts of the kidneys to increase sodium and water reabsorption and potassium excretion. Cortisol is a glucocorticoid that also has mineralocorticoid activity but is less potent than aldosterone in regulating electrolytes. Insulin and glucagon are hormones that regulate glucose metabolism and do not have a direct role in electrolyte balance.

The Most Important Mineralocorticoid Regulator of Electrolyte Concentrations in Extracellular