Insulin is a peptide hormone, which plays a major role in the regulation of glucose homeostasis. Insulin acts mainly on hepatocytes and adipocytes (cells of adipose tissue) and enhances cellular glucose uptake and utilization. As a result three is a rapid movement of glucose from blood to hepatocytes and adipocytes resulting in decreased blood glucose level (hypoglycemia). Insulin also stimulates conversion of glucose to glycogen (glycogenesis) in target cells