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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Dark Chocolate Is Healthy Chocolate Also, from WebMD Medical News, learn how dark chocolate may help lower blood pressure. View Article Sources Sources. SOURCES: Taubert, D. TheJournal of the Blood pressure update - includes related article on blood pressure Blood pressure update - includes related article on blood pressure drugs from Health News in Health provided free by Find Articles. High blood pressure: causes, risks, and treatment High blood pressure - Feature articles Contrary to popular belief, high blood pressure rarely causes any signs or symptoms until damage caused by the Blood Pressure Health Center Answers to your questions about blood bressure and more! Information you can trust: health guides, the latest news, tips, tools, animations and newsletters. Medical College of Wisconsin Healthlink Topics: Blood/Blood Pressure Please Take the HealthLink Survey. Receive HealthLink via email! Subscribe now >>. List all articles under Blood/Blood Pressure alphabetically or Hypertension - Wikipedia, the free encyclopedia Main article: Hypertension of pregnancy. Although few women of childbearing age have high blood pressure, up to 10% develop hypertension of pregnancy. high blood pressure articles, information and news Feature articles on high blood pressure:. Unraveling the lies about the antioxidant study on vitamins E and C. A new study published in the August 13, Blood pressure - Wikipedia, the free encyclopedia Arterial blood pressure (BP) is most accurately measured invasively. .. Main article: Hypotension. Blood pressure that is too low is known as hypotension blood pressure articles, information and news Feature articles on blood pressure:. Topics Covered At The American Heart Association's Scientific Sessions 2007. (NewsTarget) Results from various research High blood pressure (hypertension) - causes, treatments and Source:MedicineNet; Read 952 more High Blood Pressure related articles Latest Medical News. Cholesterol-Stroke Relationship Puzzles Researchers Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and Electrolytes are lost through bodily secretions such as sweat, diarrhea, vomiting. Source:MedicineNet; Read 102 more Low Blood Pressure related articles . |
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