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.

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Putting the Blood Pressure Monitor to Work
Putting the Blood Pressure Monitor to Work. blood pressure monitor reads 125 over 75 The Red Wine Blood Pressure experiment unfolds.

Coffee At Work Equals High Blood Pressure
Coffee At Work Equals High Blood Pressure. The aroma of freshly-brewed coffee may be one of the great comforters of the workaday world, but the actual

Health 24 - Hypertension, Explaining Hypertension
So how does blood pressure work? Itâ™s created by your heart pushing the blood through your Two measurements are taken to work out your blood pressure.

Cadernos de Saúde Pública - Association between diastolic blood
Abstract Diastolic blood pressure was viewed as a generic indicator of aging, and its association with cumulative work time was studied after controlling

What's Your Blood Pressure and How Do Blood Pressure Medications
This is because there are numerous medications to control blood pressure. They all differ in how they work, but they all rely upon mechanisms already in

High Blood Pressure: Work With A Doctor To Control It. » Propeller
7 votes / No sinks. High Blood Pressure: Work With A Doctor To Control It. Health & Fitness â“ Blood pressure is generally measured in two terms.

Blood Pressure Drug Might Work Against Alzheimer's
It prevents formation of beta-amyloid clumps in mice, study says.

MedlinePlus: Blood Pressure Drug Might Work Against Alzheimer's
Blood Pressure Drug Might Work Against Alzheimer's.

Blood Pressure Drug Might Work Against Alzheimer' - Alzheimer's
Blood Pressure Drug Might Work Against Alzheimer's. By Ed Edelson HealthDay Reporter. THURSDAY, Oct. 25 (HealthDay News) -- The blood pressure drug

High Blood Pressure (Hypertension) - Introduction - Revolution Health
Even routine activities, such as attending a meeting, can raise your blood pressure. So can commuting to work or smoking a cigarette.

Yard work and housecleaning improve blood pressure: IU News Room
Everyday around-the-house activities such as housecleaning, yard work and washing the car have been shown to significantly lower blood pressure in people

BBC NEWS | Health | Job stress raises blood pressure
Job strain, particularly in workers with low social support at work, may contribute to increased blood pressure. Study author Dr Chantal Guimont

Work Stress and High Blood Pressure
Studies into work patterns and blood pressure reveal significant associations between work stress and high blood pressure.

Work and Blood Pressure
What is the extent to which transient stress-induced increases of blood pressure may contribute to the onset of sustained hypertension?

High Blood Pressure -- Why It Is Bad
High blood pressure makes your heart work harder than normal. Both the heart and arteries are then more prone to injury. High blood pressure increases the

Long Hours Up High Blood Pressure Risk
Compared with people who work 11 to 39 hours a week, those who work 40 hours are 14% more likely to report having high blood pressure. Those who work 41 to

High blood pressure: Get the most out of home monitoring
Monitoring your blood pressure at work, if privacy is possible, can help exclude white-coat hypertension as well. Home and workplace monitoring may also

Howstuffworks "How does a blood pressure gauge (sphygmomanometer
When I go to the doctor's office and they put that cuff thing around my arm to check my blood pressure, what are they doing? What are they listening for


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