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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Arch Pediatr Adolesc Med -- Abstract: Normative oscillometric Normative oscillometric blood pressure values in the first 5 years in an We measured blood pressure (BP) and heart rate in 1554 healthy infants and Normal Blood Pressure Rate in Children - What is the normal blood Blood pressure is how hard the blood is flowing against the walls of blood It is good to be asking about normal blood pressure values for children Journal of Human Hypertension - Abstract of article: Normal blood Normal blood pressure values as perceived by normotensive and One of the reasons may be the poor awareness of the blood pressure (BP) cutoff values that Algorithms for Converting Random-Zero to Automated Oscillometric Recent studies used automated oscillometric blood pressure devices (AODs) This analysis aimed to compare blood pressure values by device and to develop Blood Vessels Various facts about human blood pressure for nursing students. Blood pressure values. There is no such value as a 'normal' blood pressure for the Medindia.net - Blood Pressure charts Medindia has devised a very simple calculator to find out you blood pressure level based on your age. Itâ™sa means just to alert you whether your blood Untitled Document Pulmonary Artery Pressure (PA Pressure): Blood pressure in the pulmonary artery. Increased pulmonary artery pressure may indicate: a left-to-right cardiac Tighter Control of Blood Pressure Can Prevent More Strokes Incidence of stroke was shown to increase among high normals (130 to 139) compared to those with normal, average blood pressure (< 130). eMJA: Ambulatory blood pressure monitoring Normal blood pressure values for adults are < 135/85 mmHg for daytime, The first device for non-invasive ambulatory blood pressure monitoring was Microlife 'as easy as 123' Blood Pressure Monitor Info and Sales The blood-pressure values must lie within certain normal ranges in order to With blood-pressure values that are too low, i.e. systolic values under Blood pressure - Wikipedia, the free encyclopedia Factors such as age, gender and race influence blood pressure values. Pressure also varies with exercise, emotional reactions, sleep, digestion and time of |
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