Heat distribution unit. The Heat Distribution Unit (HDU), also known as a Heat Interface Unit (HIU), provides domestic hot water (DHW) and space heating to properties that are serviced from district heating or centralised boiler plants.
Called hypoglycemia, this deficiency of glucose in the blood is considered critical at, or below, 40 milligrams of glucose per deciliter of blood, or 40 mg/dL. However, this figure must be adjusted individually, as the exact level at which an a person develops symptoms varies.
If the pancreas doesn't produce enough insulin, the sugar can't enter the cells. It stays in the bloodstream causing high blood sugar, or hyperglycemia (diabetes). Normal blood sugar levels range from 80 to 120 mg of glucose per 100 cubic centimeters of blood. Anything above 160 mg or below 65 mg results in either high or low blood sugar (LBS) and is considered abnormal. In the case of LBS, hormones, such as glucagon, work to raise glucose levels. Other fight or flight, or counter regulatory hormones (epinephrine and norepinepherine) kick in when the body senses danger.