Answer: negative.
- A negative
- B positive
- C no
- D random
Correct answer: A. negative
Explanation: Negative feedback keeps hormone levels within a normal range.
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.