NCIt definition : A recombinant form of the naturally occurring human pancreatic hormone insulin. Upon
administration, regular insulin mimics the action of endogenous human insulin and
binds to insulin receptors located on muscle and fat cells. This both facilitates
the cellular uptake of glucose and lowers blood glucose levels. In addition, insulin
inhibits the liver's conversion of stored glycogen into glucose, which also decreases
blood glucose levels. Insulin also inhibits lipolysis in adipose tissue, inhibits
proteolysis, and enhances protein synthesis.;