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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Vitamins C, E May Lower Blood Pressure 8/6/00 Recent studies have shown that antioxidants may help to reduce high blood pressure (hypertension), possibly by protecting the body's supply of nitric oxide, UB Reporter: High blood pressure linked to nitric oxide production High blood pressure linked to nitric oxide production in white preemies of nitric oxide (NO), a critical biological component known to relax blood Amazon.com: NO More Heart Disease: How Nitric Oxide Can Prevent "The discovery of Nitric Oxide by Lou Ignarro, and the role that it plays in . There are two blood pressure readings too monitor: systolic pressure, Critical Care | Full text | Nitric oxide inhibition rapidly Nitric oxide inhibition rapidly increases blood pressure with no change in outcome in cardiogenic shock: the TRIUMPH trial Réda Salem, Alexandre Mebazaa Tips to Control High Blood Pressure According to Saunders, exercise is so effective at controlling blood pressure because it stimulates a substance within our bodies called nitric oxide. Nitric Oxide and the Regulation of Blood Pressure in the Nitric Oxide and the Regulation of Blood Pressure in the Hypertension-Prone and Hypertension-Resistant Sabra Rat. Daryl Rees; Drori Ben-Ishay; Physiology or Medicine for 1998 - Press Release for their discoveries concerning "nitric oxide as a signalling molecule in the In this way, NO controls the blood pressure and its distribution. Blood pressure: information about, high blood pressure, symptoms It controls the expansion and contraction of blood vessels, and thus blood pressure, by regulating the amount of nitric oxide to which the vessels are uci health blood pressure and nitric oxide Disease or accidents can disrupt the enzyme's "fine-tuning," making it produce too much nitric oxide. This disruption can cause high blood pressure (or Nitric oxide: From menace to marvel of the decade Septic shock depresses blood pressure. The loss of blood flow can cause tissue damage, and that in turn increases the production of nitric oxide, uci health nitric oxide and blood pressure According to a UC Irvine College of Medicine study, this pattern occurs because high blood pressure causes the inactivation of nitric oxide, an important |
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