Final answer:
The normal range for fasting blood glucose levels is 80 to 120 mg/dL. Levels below 100 mg/dL are normal, while levels between 100 and 125 mg/dL can indicate pre-diabetes, and above 125 mg/dL could result in a diabetes diagnosis.
Step-by-step explanation:
The normal range for a fasting blood glucose level is 80 to 120 mg/dL. This corresponds to option 1) 80 to 120 mg/dL. Blood glucose levels are tightly regulated by hormones such as insulin and glucagon. A fasting blood glucose below 100 mg/dL is generally considered normal, whereas levels between 100 mg/dL and 125 mg/dL indicate a pre-diabetic state, and levels exceeding 125 mg/dL may lead to a diagnosis of diabetes. A fasting glucose level tells us how well our body is maintaining blood glucose levels. Individuals with a fasting blood glucose level within the stated range are generally not considered to have diabetes.