Which hormone is secreted by the adrenal cortex?

The adrenal cortex is responsible for producing a variety of hormones, with cortisol and aldosterone being among the primary ones. Cortisol, known as the "stress hormone," plays a crucial role in metabolism and immune response, while aldosterone regulates sodium and potassium levels, influencing blood pressure and fluid balance.

Aldosterone specifically acts on the kidneys to promote the reabsorption of sodium and the excretion of potassium, which helps maintain electrolyte balance and blood pressure. This regulation is vital for overall homeostasis and is crucial in situations where the body needs to conserve water and sodium.

While adrenaline is produced by the adrenal medulla, not the cortex, and insulin is secreted by the pancreas, the correct designation of aldosterone as a hormone secreted by the adrenal cortex emphasizes its role in the body's regulatory processes. Thus, understanding the distinction of hormones produced by different parts of the adrenal gland is important for grasping endocrine function and system regulation.