What type of system is required to maintain the amount of sugar in the blood at a certain level, making sure it does not rise too high or fall too low?

A. one negative and one positive feedback loop
B. two positive feedback loops
C. one negative feedback loop
D. two negative feedback loops

Explanation:    Toghether, insulin and glucagon help maintain a state called homeostasis in which conditions inside the body remain steady. When blood sugar is too high, the pancreas secretes more insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them.

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