How pancreas helps in controlling blood sugar?
A group of lobe called acini produce four digestive enzymes, these travels through a series of small ducts to the main pancreatic duct. That duct carries the enzymes into the duodenum. Between the acini are group od ductless cells known as Islets of Langerhans, These cells send hormones directly into the blood to the control the level of glucose in the body.
The Islets also produce a hormone called glucose which has the effect of raising rather than lowering the level of sugar in the blood. The purpose of the insulin is to keep the level of sugar in the blood down to normal levels. A lack of these hormones causes diabetes a condition which can be treated with an injection of insulin or by diet control. If the level of sugar in the blood bins to rise above certain limits, the Islets of Langerhans respond by releasing insulin into the bloodstream. The insulin then acts to oppose the effects of hormones such as cortisone and adrenalin which raise the level of sugar in the blood.
The insulin exerts its effect by allowing sugar to pass from the bloodstream into the body cells to be used as fuel. But if insulin is absent from the system the mechanism for balancing the blood sugar level is removed, because the sugar in the blood cannot be converted into fuel for the cells then diabetic results.