Where are the hormones secreted by the posterior pituitary actually produced?

• A. In the pineal gland
• B. In the posterior pituitary
• C. In the anterior pituitary
• D. In the hypothalamus

Answer: (D)

Verified step by step guidance

1. Understand the role of the posterior pituitary: The posterior pituitary does not produce hormones itself; it stores and releases hormones produced elsewhere.
2. Identify the hormones involved: The posterior pituitary releases two main hormones—oxytocin and antidiuretic hormone (ADH, also called vasopressin).
3. Learn where these hormones are produced: Both oxytocin and ADH are synthesized by neurosecretory cells located in the hypothalamus.
4. Understand the transport mechanism: After production in the hypothalamus, these hormones are transported down axons to the posterior pituitary for storage and eventual release into the bloodstream.
5. Clarify the distinction: The hypothalamus is the actual site of hormone production, while the posterior pituitary serves as a storage and release site for these hormones.