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.
In the United States, cholesterol levels are calculated in milligrams of cholesterol for each deciliter of blood. A result of under 200 mg per dL (5.2 mmol/L) is ideal. A level somewhere between 200 to 239 mg per dL (5.2 and 6.2 mmol/L) is within the edge line of high-risk class. normal HDL cholesterol is in between 40 and 49 mg per dL (1 and 1.3 mmol/L) for men. As for women, it is between 50 and 59 mg per dL (1.3 and 1.5 mmol/L).