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 average, or normal, good cholesterol in men is 42 to 44 mg/dL at all ages; while the average good cholesterol in women is 53 mg/dL before age 30, 57 mg/dL at ages 30 to 39, 58 mg/dL at ages 40 to 49, 60 mg/dL at ages 50 to 59 and 62 mg/dL above 60.otal cholesterol measurements in women become a major heart-disease risk factor after menopause because their average total cholesterol leaps from 194 mg/dL when they're 40 to 49 years old to 219 mg/dL when they're 50 to 59.