text: Insulin is released into the blood by beta cells ( Î - cells ) , found in the Islets of Langerhans in the pancreas , in response to rising levels of blood glucose , typically after eating . Insulin is used by about two-thirds of the body 's cells to absorb glucose from the blood for use as fuel , for conversion to other needed molecules , or for storage .
simplified: This insulin tells the cells to take up glucose from the blood .