When you eat a bag of cookies, your blood sugar level increases. As blood sugar levels rise, insulin levels increase to move the sugar into the cells and lower the blood sugar level. As the blood sugar level drops, so does the level of insulin. This is an example of

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This is an example of negative feedback because the increase in insulin in response to high blood sugar levels acts to decrease the blood sugar, thereby restoring the system to its normal state. Negative feedback mechanisms work to maintain homeostasis by counteracting deviations from a set point.

When You Eat a Bag of Cookies, Your Blood Sugar