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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IngentaConnect Comparison of the automated Dinamap blood pressure Comparison of the automated Dinamap blood pressure monitor with the mercury sphygmomanometer for detecting hypertension in the day case pre-assessment Blood pressure monitor, a sample of the element Mercury in the Description and origins of Blood pressure monitor, a sample of the element Mercury in the Periodic Table. Manual Blood Pressure Monitor Electronic display manual blood pressure monitor. It is a manual device It displays every 2mmHg It is easier to read than mercury Accuracy of the Dinamap 1846 XT automated blood pressure monitor A standard portable mercury manometer and dual headed stethoscope were utilised. . Clinical evaluation of the oscillometric blood pressure monitor in Sample of the element Mercury in the Periodic Table Blood pressure monitor. A blood pressure monitor like this contains at least a cubic inch of mercury, far more than the typical thermometer. Checking Up on Blood Pressure Monitors Blood pressure is typically measured in units of millimeters of mercury, They are not commonly used by U.S. physicians to diagnose or to monitor Blood Pressure Chart - Normal Blood Pressure Range Normal blood pressure range chart, using a blood pressure monitor. For the scientists among you: The pressure of 1mm of mercury = 0.019337 PSI. Modern devices to measure blood pressure Automatic Non-Invasive Blood Pressure (NIBP) Monitor - Ambulatory Blood Pressure Monitor Mercury Sphygmomanometer This includes a mercury manometer, Accuracy of a wrist blood pressure monitor A study conducted in Switzerland compared the blood pressure measured by a wrist monitor (the Omron R3) with the traditional mercury sphygmomanometer Home Blood Pressure Test These two pressures are expressed in millimeters of mercury (mm Hg) because the The type of blood pressure monitor typically found in supermarkets, Selecting a Sphygmomanometer or Blood Pressure Monitor - from Comparison of the Omron HEM-713C automated blood pressure monitor with a standard ausculatory method using a mercury manometer. Mufunda J, Sparks B, |
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