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This quick reference is your comprehensive lookup of diabetes terms and their meanings.

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Backlight button -  The backlight button is a feature of some pumps that is used to turn on a light behind the display screen.
Basal -  The amount of insulin needed to meet metabolic insulin requirements when an individual is not eating. The amount needed is usually 40 to 50 % of total daily insulin needs.
Basal rate -  The basal rate is the amount of insulin that is continuously delivered by an insulin pump. It is measured in units per hour (U/hr). The basal rate usually provides about 40% to 60% of the daily total delivery of insulin.
Beta cells -  Beta cells are found in the pancreas. They produce insulin, which lowers blood glucose levels. In Type 1 insulin dependent diabetes the beta cells are destroyed, so the body can no longer produce insulin.
Blood glucose -  The main sugar that the body makes from the three elements of food-proteins, fats, and carbohydrates-but mostly from carbohydrates. Glucose is the major source of energy for living cells and is carried to each cell through the bloodstream. However, the cells cannot use glucose without the help of insulin.
Blood glucose levels -  The measure of how much glucose (blood sugar) is in the blood. The normal level (euglycemia) is about 4 - 7 mmol/l before meals and less than 8 mmol/l after meals.
Bolus -  The amount of insulin delivered at one time, usually before a meal or when blood glucose is high.