HATTIE YOUNG / SCIENCE PHOTO LIBRARY HATTIE YOUNG / SCIENCE PHOTO LIBRARY
A diabetic injects herself before a meal. She is using a Novopen which delivers a dose of Human Actrapid short-acting insulin subcutaneously. A single injection of Human Ultratard long-acting insulin must also be administered each day to provide a basal level. Diabetes is caused by insufficient insulin production by the pancreas, which prevents the tissues from absorbing glucose from the blood. Unless insulin replacement therapy is given blood sugar rises and glucose is excreted in the urine. Thirst, hunger, fatigue, weight loss, coma and death may follow if blood glucose levels are not controlled via diet and insulin administration.
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