A good example of a positive feedback mechanism would be _ __________ .
A) regulating glucose levels in the blood
B) body temperature regulation
C) blood calcium level regulation
D) enhancement of labor contractions

Question

Quizplus · Accepted Answer

Enhancement of labor contractions is a good example of positive feedback mechanism. During labor, as the baby's head pushes against the cervix, nerve impulses are sent to the hypothalamus, which stimulates the release of the hormone oxytocin from the posterior pituitary gland. Oxytocin then causes the muscles of the uterus to contract, which pushes the baby further down the birth canal. As the baby moves down the birth canal and pushes against the cervix even more, the nerve impulses to the hypothalamus increase, which leads to more oxytocin release and stronger uterine contractions. This cycle continues until the baby is born. This is an example of positive feedback because the effect (baby pushing against the cervix) leads to an increase in the stimulus (nerve impulses) which leads to an increase in the response (oxytocin release and stronger uterine contractions).

A Good Example of a Positive Feedback Mechanism Would Be