Blood sugar regulation cells in the pancreatic islets are among the most well understood and important. If the blood glucose level falls to dangerous levels (as during very heavy exercise or lack of food for extended periods), the alpha cells of the pancreas release glucagon, a hormone whose effects on liver cells act to increase blood glucose levels. They convert glycogen into glucose (this process is called glycogenolysis). The glucose is released into the bloodstream, increasing blood sugar. Hypoglycemia, the state of having low blood sugar, is treated by restoring the blood glucose level to normal by the ingestion or administration of dextrose
Electric organ and pipe/digital hybrid organs now significantly outsell pipe organs is the dwindling number of pipe organ dealers. Many churches are hundreds of miles from dealers capable of selling, installing and servicing pipe organs. Most new digital church organs synthesize sounds from recorded pipe samples, although some including Eminent model the pipe sound by additive synthesis. Modelling the sound is done by a professional organ "voicer", who finishes the organ in its location, much like the process of regulating and voicing a pipe organ. These organs also use very high-quality custom-designed audio systems. The builders of both custom and factory digital