Question

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

Explanation:

This question is about understanding negative - feedback and positive - feedback mechanisms in the body. Negative - feedback loops work to maintain homeostasis by counteracting changes. For example, when body temperature rises, the body takes steps to cool down, and when blood glucose is high, insulin is released to lower it. Positive - feedback loops, on the other hand, amplify a change. Uterine contractions during childbirth get stronger as the process progresses, which is a positive - feedback mechanism. Options A, B, and C describe negative - feedback processes, while option D describes a positive - feedback process.

Answer:

D. increasing strength of uterine contractions in response to cervical stretch