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.
A normal cholesterol range is somewhere between 70 and 130 for LDL or bad cholesterol. A normal, healthy total cholesterol score needs to be under 200. HDL cholesterol tends to be to 1/3rd or 1/4th of your total cholesterol score and (in general) the higher this number, the better condition your arterial system is in.