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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Nikon MicroscopyU: Human Pathology Digital Image Gallery Pulmonary Edema at 10x Magnification - High blood pressure has been linked with an increased risk of not only cardiovascular disease and pulmonary edema, Pulmonary edema - CNN.com Blood pressure medications. If you have high blood pressure when you develop pulmonary edema, you'll be given medications to control it. On the other hand, Edema - High Blood Pressure Symptoms Learn about Edema, including Edema symptoms and Edema Treatment Information. Lotrel.com Lotrel.com. Diagnose-Me: Condition: Edema (Water Retention) Pregnancy with leg edema occurs because the pregnant uterus puts pressure on the vena cava, a major blood vessel that returns blood to the heart from the Edema and Blood Pressure Control in NSAID Users - Journal Watch In an attempt to compare the effects of nonselective nonsteroidal anti-inflammatory drugs (NSAIDs) and cyclooxygenase (COX)-2 inhibitors on blood pressure MedlinePlus Medical Encyclopedia: Foot, leg, and ankle swelling Lower leg edema · Lower leg edema a serious condition sometimes called toxemia, that includes high blood pressure and swelling; Being overweight Pulmonary edema: Causes - MayoClinic.com If the leakage develops suddenly, you may develop sudden and severe pulmonary edema. High blood pressure (hypertension). Untreated or uncontrolled high Edema Pulse rate and blood pressure may be elevated. Hand and neck veins may be observed as fuller. Diagnosis. Edema is a sign of an underlying problem, UpToDate Patient information: Edema Kidney disease â” The edema of kidney disease causes swelling in the legs and around the eyes. It is caused by an increase in pressure in the blood vessels; Edema (Pitting and Non-Pitting Edema) Causes, Diagnosis, Symptoms What is pitting edema and how does it differ from non-pitting edema? risen blood pressure, toxin build up and lack of red blood cells. |
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