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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The Key To Increasing Blood Pressure Control Rates may be a Single Millions of Americans take medications for hypertension but do not achieve control of their blood pressure. Single-tablet combinations of drugs may be what BBC News | HEALTH | Call for yearly blood pressure checks A study published in the Lancet also suggests people with normal blood pressure rates should be checked every two years. Existing recommendations vary from Vital Signs (Body Temperature, Pulse Rate, Respiration Rate, Blood body temperature; pulse rate; respiration rate (rate of breathing); blood pressure (Blood pressure is not considered a vital sign, but is often measured More Kids Developing High Blood Pressure - washingtonpost.com The rate of health-threatening high blood pressure has started rising among American children for the first time in decades, researchers reported yesterday, heart rate and blood pressure variability The combination of reflexes are often called the exercise pressor reflex since they produce an increase in blood pressure and also in heart rate. Blood Pressure Blood pressure represents the force (pressure) exerted by blood against the by multiplying heart rate by stroke volume (the amount of blood ejected by Blood pressure - Wikipedia, the free encyclopedia The higher the heart rate, the higher (potentially, assuming no change in stroke volume) the arterial pressure. Volume of fluid or blood volume, New high blood pressure guidelines say start early, treat aggressively Current rates of blood pressure control are still far below the Healthy People 2010 goal, which is to have 50 percent of Americans reach the blood pressures Wartime Raises Stress, Blood Pressure Rates In Military Offspring Children with parents in the military have higher blood pressure, heart rates and general stress levels than their peers during wartime, researchers say. 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 vessels in the body. Medindia.net - Blood Pressure charts Itâ™sa means just to alert you whether your blood pressure level is on par with your Pulse Rate During Physical Exertion · Activity Calorie Calculator |
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