What is the function of glucose in the human body. How much glucose in the blood is normal? What is the danger of a sharp decrease in plasma glucose concentration?

Blood glucose is a direct source of energy in the body. The speed of its decay and oxidation, as well as the ability to quickly extract from the depot provide emergency mobilization of energy resources with rapidly increasing energy costs in cases of emotional arousal, with intense muscle loads, etc.
The level of glucose in the blood is 3.3-5.5 mmol / l and is the most important homeostatic constant of the body. The central nervous system is especially sensitive to lowering blood glucose (hypoglycemia). Minor hypoglycemia is manifested by general weakness and rapid fatigue. With a decrease in blood glucose to 2.2-1.7 mmol / L (40-30 mg%), convulsions, delirium, loss of consciousness, as well as autonomic reactions develop: increased sweating, changes in the lumen of the skin vessels, etc. This condition has received the name is hypoglycemic coma. The introduction of glucose into the blood quickly eliminates these disorders.


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