All of the following are examples of positive feedback except:
A) sweating in response to elevated body temperature.
B) secretion of insulin in response to increased blood glucose.
C) secretion of glucagon in response to decreased blood glucose.
D) uterine contractions in response to the pressure of the baby's head on the cervix.

Question

Quizplus · Accepted Answer

As the fetus reaches full term, its head pushes on the cervix. The increased pressure on the cervix causes the cervix to release prostaglandins, which cause the uterus to contract, moving away from homeostasis. The contractions cause the fetal head to push harder on the cervix which increases the pressure. The cervix responds by making more prostaglandins, leading to more contractions, further increasing the fetal head's pressure on the cervix.

All of the Following Are Examples of Positive Feedback Except