An Important Regulator of Electrolyte Concentrations in Extracellular Fluids Is

Question

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

Accepted Answer

The hormone aldosterone is released by the adrenal gland in response to low sodium or high potassium levels in the blood. Aldosterone promotes reabsorption of sodium and excretion of potassium in the kidneys, which helps regulate electrolyte concentrations in extracellular fluids. Cortisol, insulin, and glucagon do not have a direct role in electrolyte regulation.