Answer: growth hormone.
- A growth hormone
- B plain insulin
- C plain adrenaline
- D plain thyroxine
Correct answer: A. growth hormone
Explanation: Growth hormone from the pituitary stimulates growth of bones and tissues.
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.