English: As we consume food, our glucose levels increase as the food is broken down causing Beta cells in the pancreas to release the hormone, Insulin. Insulin's job is to have cells like liver and adipose cells take in and store glucose in the form of glycogen. After this happens - less glucose is detected in our bloodstream. But if our glucose level decreases too much due to maybe skipping a meal, another type of cell is activated, Alpha cells. These cells also reside in the pancreas and release the glucagon hormone which reverses insulin's work by having the cells that are storing glycogen breaks down into glucose molecules and release it back into the bloodstream. This will increase our glucose level back to normal and then the cycle continues because we periodically consume food/glucose.