Which of the following describes a body process that is controlled using a positive feedback loop?
A)increasing body temperature in response to a drop in body temperature
B)decreasing body temperature in response to elevated body temperature
C)decreasing blood [glucose] in response to elevated blood [glucose]
D)increasing strength of uterine contractions in response to cervical stretch
E)decreasing heart rate in response to elevated blood pressure

Question

Quizplus · Accepted Answer

Increasing strength of uterine contractions in response to cervical stretch is an example of a positive feedback loop. As the cervix stretches during childbirth, it triggers nerve impulses that stimulate the release of the hormone oxytocin, which causes the uterus to contract more strongly. The more the uterus contracts, the more the cervix stretches, and the more oxytocin is released. This cycle continues until the baby is born. Positive feedback loops are characterized by a self-amplifying cycle, where the output of the system reinforces the input, leading to a rapid exponential increase in the response.

Which of the Following Describes a Body Process That Is