Antidiuretic hormone is typically secreted by which gland?

Antidiuretic hormone (ADH), also known as vasopressin, is primarily secreted by the posterior pituitary gland. This gland stores and releases hormones produced by the hypothalamus, including ADH. ADH plays a crucial role in regulating water balance in the body by promoting the reabsorption of water in the kidneys, which helps to concentrate urine and manage hydration levels.

In contrast, the anterior pituitary gland is responsible for producing and releasing different hormones such as growth hormone and prolactin, while the thyroid gland is involved in metabolism regulation and produces hormones like thyroxine. The pineal gland primarily secretes melatonin, which regulates sleep-wake cycles. Therefore, understanding the specific functions and secretions of these glands clarifies why the posterior pituitary gland is indeed the correct answer for where ADH is secreted.