What is positive feedback in hormone regulation?

What is positive feedback in hormone regulation?

• A. Inhibits hormone release
• B. Maintains homeostasis by steady levels
• C. Produces no change
• D. Intensifies physiological change, like childbirth or blood clotting

Answer: (D)

Positive feedback in hormone regulation is when a response action amplifies the original stimulus, driving a process to completion rather than keeping hormone levels steady. For example, during childbirth, cervical stretch triggers the release of oxytocin, which increases uterine contractions. Those stronger contractions cause even more cervical stretch, leading to more oxytocin release and a rapid progression to birth. In blood clotting, an injury begins a cascade where each activated factor accelerates the next steps, rapidly forming a clot until the wound is sealed and the cascade is halted by regulatory mechanisms. This contrasts with maintaining constant hormone levels (negative feedback) or producing no change.

Positive feedback in hormone regulation is when a response action amplifies the original stimulus, driving a process to completion rather than keeping hormone levels steady. For example, during childbirth, cervical stretch triggers the release of oxytocin, which increases uterine contractions. Those stronger contractions cause even more cervical stretch, leading to more oxytocin release and a rapid progression to birth. In blood clotting, an injury begins a cascade where each activated factor accelerates the next steps, rapidly forming a clot until the wound is sealed and the cascade is halted by regulatory mechanisms. This contrasts with maintaining constant hormone levels (negative feedback) or producing no change.