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Blood Glucose

Meaning

Blood glucose, or blood sugar, represents the concentration of the simple sugar glucose circulating in the plasma, serving as the primary immediate energy substrate for cellular respiration throughout the body. Maintaining this concentration within a narrow physiological range is a critical homeostatic function managed primarily by the pancreatic hormones insulin and glucagon. Deviations, whether hyperglycemia or hypoglycemia, signal a disruption in energy substrate availability or utilization, profoundly affecting neurological and metabolic health. This metric is fundamental to assessing carbohydrate metabolism and endocrine control.