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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Features to look for in a blood pressure monitor. The right cuff size is very to tell you the cuff size you need, based on the size of your arm. Blood

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No Cuff Placement or Adjustment. No Tubes. No Hassle! Daily blood pressure monitoring is made simple with the EW3152A upper arm blood pressure monitor.

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When the pressure in the cuff decreases to a certain value, the blood begins to flow through the arm. At this time if we look at the oscilloscope,

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Automatic Arm-Style Blood Pressure Monitor After you have positioned the cuff on the brachial artery in your left arm (see directions under manual monitors,

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The Panasonic EW3122S Upper Arm Blood Pressure Monitor comes with four AA Alkaline batteries which are also included. An AC adaptor and large cuff are also

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Daily blood pressure monitoring is made simple with the EW3152A upper arm blood pressure monitor. There is no cuff to wrap. Just stick your arm through unit

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Contains: 1 digital automatic blood pressure monitor; 1 contoured arm cuff (fits arms 9 inches to 13 inches in circumference); 1 AC adapt. Read More

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Taking your blood pressure is easy with the Omron HEM-712C fully automatic blood pressure monitor. Simply wrap the cuff around your arm and press START.


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