Which part of the adrenal gland produces aldosterone?

The adrenal gland is composed of different layers, each responsible for producing various hormones. The adrenal cortex, which is the outer portion of the adrenal gland, is specifically responsible for the production of aldosterone. Aldosterone is a mineralocorticoid hormone that plays a critical role in regulating sodium and potassium levels in the body, as well as maintaining blood pressure by influencing kidney function.

In contrast, the adrenal medulla, which is the inner part of the adrenal gland, primarily produces catecholamines like epinephrine and norepinephrine, which are involved in the body’s stress response. The adrenal capsule is simply a protective layer surrounding the adrenal gland and does not have a role in hormone production. The pituitary gland is a separate endocrine gland that regulates various hormone functions in the body, including those of the adrenal glands, but it does not produce aldosterone itself.

Thus, the adrenal cortex is the correct answer because it is the specific region of the adrenal gland where aldosterone is synthesized and secreted.