The process of getting glucose into our bloodstream starts with a hormone called glucagon being released by the pancreas to signal the body that it needs replacement energy in the form of food. Feelings of hunger then lead to multiple processes that eventually end in glucose being released into the bloodstream after food is digested. Once this occurs, when a cell needs energy, glucose is absorbed across the cell's membrane with a little help from a hormone called insulin. Insulin is also produced in the pancreas and is released into the bloodstream constantly. When our blood glucose gets too high, like after eating a meal, it gets released at a much higher rate to counteract the rise in glucose and brings the glucose levels back to normal. The balance of these two hormones is what drives our desires of hunger versus feeling full.