Answer: childbirth (labour).
- A childbirth (labour)
- B food digestion
- C gas exchange
- D urine formation
Correct answer: A. childbirth (labour)
Explanation: Oxytocin triggers uterine contractions during labour and milk ejection.
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.