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.
Dear Jonathan, thank you for your question. Hypercholesterolemia and hyperlipidemia are indeed interchangeable terms that describe the same condition. Normal values for the cholesterol levels are as follows: - Total cholesterol 45 - LDL cholesterol < 130 - Triglycerides < 200 Currently, it is generally accepted that everyone over 30 years old have a complete lipid profile every 5 yrs.