Answer: Thyroid-stimulating hormone.
- A Thyroid-stimulating hormone
- B General growth hormone
- C Milk-releasing prolactin
- D Water-saving vasopressin
Correct answer: A. Thyroid-stimulating hormone
Explanation: TSH (thyroid-stimulating hormone) from the anterior pituitary stimulates the thyroid to release thyroxine.
The hypothalamus releases hormones that direct the pituitary, which releases its own trophic hormone to a target gland; that gland's hormone output then feeds back (dashed lines) to suppress both the pituitary and hypothalamus once levels are sufficient - a self-correcting loop running the entire endocrine system.
Concept context
The endocrine glands, hormone classification and mechanism of action, and negative feedback regulation.