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The pancreas detects this rise in blood glucose and starts to secrete insulin. Insulin works by improving the uptake of glucose from the blood across cell membranes and into the cells of the body, and so takes glucose out of the bloodstream.
Insulin then attaches to and signals cells to absorb sugar from the bloodstream. Insulin is often described as a âkey,â which unlocks the cell to allow sugar to enter the cell and be used for energy. After you eat, cells in your pancreas are signaled to release insulin into the bloodstream.