Which of the Following Is an Example of Positive Feedback

Multiple Choice

Which of the following is an example of positive feedback?

A) After eating a meal containing high glucose levels, the pancreas secretes more insulin, a hormone that lowers blood glucose levels.
B) After cutting your finger, the injured tissue releases chemicals that activate platelets in the blood. These activated platelets release chemicals to activate more platelets, leading to the formation of a blood clot.
C) An elevation in blood pressure causes heart rate to decrease, thereby causing blood pressure to decrease.
D) The secretion of the hormone TSH stimulates the thyroid gland to secrete thyroxine. Thyroxine, in turn, inhibits the secretion of TSH.