Final answer:
Hypoglycemia in adults following an overnight fast is technically defined as a blood glucose level of 70 mg/dL or lower, but based on the choices provided, the closest answer is 60 mg/dL (3.3 mmol/L).
Step-by-step explanation:
Following overnight fasting, hypoglycemia in adults is defined as a glucose level of 70 mg/dL (3.9 mmol/L) or lower. However, for the specific options provided in the question, option b. 60 mg/dL (3.3 mmol/L) is the threshold that data points towards. It's important to note that various health organizations may have slight variations in the specific cutoff value for hypoglycemia. Normal fasting blood glucose levels are typically defined as being between 70 mg/dL and 100 mg/dL. A level below 70 mg/dL is indicative of hypoglycemia, while during the postabsorptive or fasting state, normal blood glucose levels are maintained in the range of 80-120 mg/dL. The body uses hormonal regulation through insulin and glucagon to maintain blood glucose within this normal range.