Question

Which is an example of the body maintaining homeostasis using a positive feedback loop?

A. glucose rises > glucagon is released > insulin is released > blood glucose lowers
B. blood glucose lowers > insulin is released > glucagon is released > glucose rises
C. glucose rises > glucagon is released > blood glucose lowers > insulin is released
D. blood glucose lowers > glucagon is released > glucose rises > insulin is release

Answer 1

It would be a negative feedback loop.

and D would be the answer.

Glucagon stimulates glucose to be released into the blood stream, which would happen if blood glucose was low, and insulin stimulates blood glucose to be taken into cells, which happens when blood glucose is too high. The only one that correctly pairs low blood conc./glucagon and high blood conc./insulin is D.