MARSEAUD, ISM / SCIENCE PHOTO LIBRARY MARSEAUD, ISM / SCIENCE PHOTO LIBRARY
Diabetes mellitus type 1. Computer artwork of malfunctional glucose metabolism in type 1 diabetes. Glucose (white) is a simple form of carbohydrate (sugar) that the body uses as energy. It is obtained from the digestion of food. Normally, as the glucose passes through the walls of the intestines (upper left) to the bloodstream, a signal is sent to the pancreas (yellow, upper centre) to secrete the hormone insulin. Insulin converts glucose into glycogen, which is then stored in the liver (centre), muscle cells (lower left) and adipose (fat) cells (lower right). Here, there is no insulin being made, as the insulin- producing cells have been destroyed by the body's immune system. See P750/176 for a diagram showing the normal metabolism of glucose.
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