What is the function of aldosterone released from the adrenal glands?

Aldosterone serves a critical role in maintaining fluid and electrolyte balance in the body, which is essential for regulating hydration levels and supporting heart function. It is a steroid hormone produced by the adrenal glands that primarily acts on the kidneys. By promoting the reabsorption of sodium and the excretion of potassium, aldosterone helps control blood volume and, consequently, blood pressure. This regulation is vital for ensuring proper cardiac output and function, as well as maintaining hydration status.

While maintaining hydration and blood pressure is crucial for overall health and performance, the other functions mentioned—regulating blood sugar levels, boosting metabolic rate, and increasing muscle growth—are not directly associated with the action of aldosterone. These processes are governed by different hormones and mechanisms within the body.