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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which includes either a column of mercury or pressure-registering gauge. The FDA, which regulates blood pressure devices, requires companies to show

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A blood pressure gauge is simply a way to measure the performance of the pump and the pipes. There are two numbers in a blood pressure reading: systolic and

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Blood pressure can be measured in other ways, such as using an automatic blood pressure gauge that can also be used at home. Electronic measuring devices

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manometer - a pressure gauge for comparing pressures of a gas. sphygmomanometer - a pressure gauge for measuring blood pressure

How To Check Your Blood Pressure
A hand bulb pumps air into the cuff, gently squeezing the arm and temporarily interrupting the flow of blood. The pressure gauge reaches a peak.

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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

Taking a blood pressure
The first time you hear this sound, note what the reading was on the pressure gage. This value represents the systolic blood pressure (described below).

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Mercury sphygmomanometer: It's the standard for blood pressure measurement. The gauge can be clumsy to position, and without a D-ring cuff can be hard

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Monitoring your high blood pressure at home will help you measure your true It has a long, tubular gauge, usually made of plastic to prevent breakage.

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Blood pressure is measured using a sphygmomanometer. Most people call it a blood pressure gauge (or cuff). Manual versions of the blood pressure gauge have

Blood Pressure Readings
Take note of the number on the blood pressure gauge at that moment, then continue pumping the bulb until the gauge reads 20 to 30 points higher.


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