What is Cholesterol?

Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication.

blood pressure range
High blood pressure - information and help about hypertension
In this way you can lower your own blood pressure without needing to take tablets. However, some people with a blood pressure in this range may be

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What is the normal blood pressure range for dogs? Answer Mean arterial blood pressure in the dog is 90-110. Return to Dog FAQs

Blood pressure ranges
However blood pressure ranges are important parameters used in the differential diagnosis of many diseases. In general, in healthy people, the systolic

Blood Pressure
The acceptable range of systolic blood pressure measures is probably within the range of 100 - 145. Many more people have blood pressure higher than 145

Blood Pressure Range
Blood pressure is always given as two numbers- systolic pressure (when the heart beats) and diastolic pressure (when the heart relaxes).

Blood Pressure Monitors: advice on accurate blood pressure monitors
There is a wide range of machines available to the public. If you are considering buying a blood pressure monitor it is important that you make an informed

Low Blood Pressure Dangers
I don't mean to minimise the useful finding in this study - namely, that people in the high-normal blood pressure range are still at an increased risk for

Introduction: Low Blood Pressure: Merck Manual Home Edition
Normally, the body maintains the pressure of blood in the arteries within a narrow range. If blood pressure is too high, it can damage a blood vessel and

Blood Pressure Monitoring at Home -- familydoctor.org
*If you have diabetes or kidney disease, high blood pressure ranges may be lower than it is for other people. Talk to your doctor about what is considered

New high blood pressure guidelines say start early, treat aggressively
The new prehypertension category focuses physician, patient and public attention on blood pressure in these ranges to motivate them to adopt

Blood Pressure Association
However, some people with a blood pressure in this range may be asked to take tablets if they are older or have other risk factors for heart disease and

High Blood Pressure (Hypertension) - Symptoms, Causes, Diagnosis
Scientists have determined a normal range for both systolic and diastolic blood pressure after examining the blood pressure of many people.

Are You In The Right Blood Pressure Range?
High blood pressure is like many health conditions; each person will be able tolerate different ranges of blood pressure levels and they will have differing

High Blood Pressure (Hypertension) - Yahoo! Health
Your blood pressure is usually normal or well controlled, but it suddenly goes well above the normal range on more than one occasion. Your blood pressure is

Blood Pressure Rangem, Hypertension, Stage, Healthy BP - Guide4Living
A healthy blood pressure range does tend to differ according to various factors In the past, a blood pressure range of 120 to 139 systolic and 80 to 89

Blood pressure - Wikipedia, the free encyclopedia
Taking blood pressure levels at home or work with a home blood pressure monitoring device may help determine a person's true range of arterial pressure

What Is High Blood Pressure?
For example, blood pressure readings of 138/82, 128/89, or 130/86 are all in the prehypertension range. If your blood pressure is in the prehypertension

Blood Pressure Chart - Normal Blood Pressure Range
Normal blood pressure range chart, using a blood pressure monitor.

Lowering Blood Pressure Tactics
Buy a digital blood pressure monitor, and use it daily. Become aware of your blood pressure range, and how it varies throughout the day.


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