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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High Blood Pressure Related Decline In Cognitive Function Affects High Blood Pressure Related Decline In Cognitive Function Affects Adults Young And Old. ScienceDaily (Oct. 6, 2004) â” High blood pressure in otherwise USATODAY.com - Study: Young men at risk for high blood pressure Study: Young men at risk for high blood pressure CHICAGO (AP) â” Younger men should be just as concerned about high blood pressure as middle-aged and older Health Report - 9/07/01: High blood pressure in young adults and Having high blood pressure when youre young may increase your risk of cardiovascular disease later in life Also the risks of high blood pressure in working Mental function declines when blood pressure rises in young adults DALLAS, Oct. 5 â“ Young people with high blood pressure are just as susceptible to decreased mental function as are elderly people with high blood pressure, BBC NEWS | Health | High blood pressure misdiagnosed Young adults may be being prescribed unnecessary medication for high blood pressure, researchers have warned. A study found doctors were more likely to Starting Young in Treating High Blood Pressure - New York Times Most children with moderate to high blood pressure will be given a prescription for lifestyle modifications, which includes dieting and exercise, Medindia.net - Blood Pressure charts High Blood Pressure- the heart exerts more force to pump the same quantity of blood within the Average Blood Pressure For young people â“ 120/80 mmHg HIGH BLOOD PRESSURE IN YOUNG MEN LINKED TO INCREASED RISK FOR CHICAGO - Young adult men with high blood pressure are at higher risk for eventually dying from heart disease and cardiovascular disease, according to an High blood pressure in young men - WebMD The risks of high blood pressure (hypertension) are serious in young men. But many young men don't get treatment or make lifestyle changes. High Blood Pressure in a Young Adult Adults over the age of 18 who have a blood pressure reading of 140/90 or higher on at least 3 separate measurements meet the criteria for hypertension. |
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