One of the characteristic features of a living cell is that it controls the exchange of electrically charged ions across the cell membrane and therefore the electrical potential of its interior relative to the exterior. This Scholarpedia page is a basic introduction into the mechanisms underlying this process.
Here are the ranges for total cholesterol in adults: 1  Normal: Less than 200 mg/dL. 2  Borderline high: 200 to 239 mg/dL. 3  High: At or above 240 mg/dL.
High: At or above 240 mg/dL. If your total cholesterol is high, you have twice the risk for heart disease as a person with normal total cholesterol. Here is the adult range for HDL cholesterol: Normal: 35 to 65 mg/dL for men, 35 to 80 mg/dL for women.If your number is less than 25 mg/dL, your risk for coronary heart disease is doubled.If your number is between 60 and 74 mg/dL, your risk for coronary heart disease is below average.ere is the adult range for HDL cholesterol: Normal: 35 to 65 mg/dL for men, 35 to 80 mg/dL for women. If your number is less than 25 mg/dL, your risk for coronary heart disease is doubled.