Aldosterone is produced by which gland?

• A. Adrenal Cortex
• B. Pituitary Gland
• C. Kidney
• D. Pancreas

Answer: (A)

Aldosterone is produced by the adrenal cortex, the outer part of the adrenal glands that sit on top of the kidneys. This mineralocorticoid helps regulate salt and fluid balance by promoting sodium reabsorption (with water following) and potassium excretion in the kidney. Its release is mainly driven by the renin-angiotensin system in response to low blood pressure or low sodium. The other options don’t produce aldosterone: the pituitary gland regulates other hormones, the kidney is where aldosterone acts, and the pancreas makes insulin and glucagon.