When you have type 2 diabetes, the receptors on your cell membranes are also less sensitive to insulin. Insulin needs to attach to these receptors in order for glucose to be able to enter the cell. Less sensitive receptors means insulin can't bind. And that means glucose can't get into the cell. Therefore, the level of glucose in the blood stays high, and the cells don't have the energy they need from glucose. Increasing the level of insulin in the body can help overcome this problem.