What the difference is between type I diabetes mellitus and type II diabetes mellitus?

Type I diabetes, also called as juvenile diabetes, or insulin-dependent diabetes (this name is not adequate as type II diabetes might be become insulin-dependent), is the impaired production of insulin by the pancreas believed to be caused by destruction of cells of the islets of Langerhans by auto antibodies (autoimmunity).

Type II diabetes happens in the adult individual and it is often diagnosed in people of more advanced age. In type II diabetes there is normal or low secretion of insulin by the pancreas but the major cause of the high glycemia is the peripheral resistance of the cells to the action of the hormone.