Which of the following body functions is an example of a positive feedback loop?
A) Maintaining a pH of 7.45 in the body
B) Forming a blood clot
C) Uterine contractions during labor
D) Both B and C

Question

Quizplus · Accepted Answer

Positive feedback loops enhance or amplify changes; this tends to move a system away from its equilibrium state and make it more unstable. Both forming a blood clot and uterine contractions during labor are examples of positive feedback mechanisms. Blood clotting leads to further clotting until the wound is sealed, and uterine contractions intensify until childbirth occurs.

Which of the Following Body Functions Is an Example of a Positive