Which of the following is not an example of negative 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.

Question

Quizplus · Accepted Answer

Option B describes positive feedback, where a stimulus results in an amplified response that ultimately leads to the same stimulus. In this case, the initial injury leads to the activation of platelets, which results in the formation of a blood clot that further activates more platelets. Negative feedback, on the other hand, involves a response that counteracts the initial stimulus to maintain balance or homeostasis. Options A, C, and D all describe negative feedback mechanisms.

Which of the Following Is Not an Example of Negative