Exemplar Problems

Question:

Describe the role of the adrenal gland, specifically the adrenal cortex, in the excretory system.

Answer:

The adrenal glands, located atop each kidney, consist of two parts: the adrenal cortex and the adrenal medulla. The adrenal cortex produces corticosteroids, including aldosterone. Aldosterone plays a crucial role in regulating electrolytes, such as sodium and potassium, which are essential for maintaining proper fluid balance in the body. It acts on the distal convoluted tubules and collecting ducts of nephrons in the kidney. Aldosterone increases the reabsorption of sodium ions and the excretion of potassium ions, helping to regulate blood pressure, blood volume, and electrolyte levels, indirectly influencing fluid balance.