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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Nov 12 (Reuters) - Chelsea Therapeutics International Ltd said US regulators accepted its investigational new drug application for Droxidopa, for treating a

High Blood Pressure in Pregnancy
The effects of high blood pressure during pregnancy vary depending on the disorder and other factors. According to the National High Blood Pressure

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Hypertensive encephalopathy is an often-fatal disease of the brain that results from extremely high blood pressure. This disorder can lead to a breakdown of

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The World's Largest Eating Disorder Referral and Information Center Specializing in . Vitamin Deficiencies, dehydration, infection and low blood pressure

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Haematology informational portal providing news and information regarding blood diseases. Includes information to help monitor blood pressure symptoms.

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The following links contain information about blood disorders. Blood Pressure Association - a UK organisation offering information about high blood

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The blood pressure and body temperature are also checked. An abnormality may suggest a heart or blood vessel disorder. The doctor inspects the veins in the

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In many of these people, high blood pressure results from a kidney disorder. Many kidney disorders can cause high blood pressure, because the kidneys are


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