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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Blood pressure - Wikipedia, the free encyclopedia Blood pressure (strictly speaking: vascular pressure) refers to the force exerted by circulating blood on the walls of blood vessels, and constitutes one of Blood pressure: information about, high blood pressure, symptoms Blood pressure: information about, high blood pressure, symptoms of high blood pressure, risks of high blood pressure. What Is High Blood Pressure? Learn about various levels of blood pressure and how high blood pressure (hypertension) is defined. Blood Pressure - Health News - The New York Times A free collection of articles about blood pressure published in The New York Times. Blood Pressure Guide Obesity, high cholesterol and high blood pressure are all cousin brothers! They hold your body to ransom and will not hesitate to pin you down at the most Blood Pressure: lifeclinic.com A blood pressure and hypertension resource with information and tools to measure and chart blood pressure over time. Information on hypertension, how to Blood Pressure and hypertension informations - High blood pressure High blood pressure (hypertension) information. Informations about high blood pressure for patients : hypertension damage, how to measure blood pressure, Food Standards Agency - Eat well, be well - Blood pressure Some people have low blood pressure and many people have normal blood pressure, but millions of people in the UK have high blood pressure, which increases DHDSP - High Blood Pressure Home Page It is estimated that 1 of 3 American adults has high blood pressure or hypertension. Having high blood pressure increases oneâ™s chance for developing heart 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. Blood Pressure - Magnesium, Potassium, Minerals, and Garlic Blood pressure is the force of the blood against the walls of the arteries, similar to the pushing of water against the sides of a garden hose. |
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