A constant supply of glucose is routed to circulate in our bloodstream, which, with the assistance of insulin, ensures energy is readily available.
Glucose is critical to our survival. A constant supply of glucose is routed to circulate in our bloodstream, which, with the assistance of insulin, ensures energy is readily available. Glucose reserves are also stored in the liver and muscles as glycogen. We typically have about a day’s worth of glucose locked up as glycogen. When blood glucose is low, the liver breaks down glycogen to raise blood glucose. When we need energy for muscular contraction and our blood glucose is low, our muscles break down their glycogen reserves.