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.
The chart here displays all 4 cholesterol numbers: HDL, LDL, triglycerides and also total cholesterol. It also displays the good ranges, along with risk zones pertaining to each one. The ideal measurements for the total cholesterol are below 200. As for triglycerides, it is below 150.