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. |
| blood pressure range by age |
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Blood Pressure Testing and Measurement There are occasions when blood pressure and other ocular findings confirm the patient must NORMAL & UPPER RANGES FOR VARIOUS AGE GROUPS. NEWBORNS: mmHg Blood Pressure SUBJECTS: 462 subjects, age range 20-89 years, in sinus rhythm and with no METHODS: four simultaneous recordings of blood pressure in both arms were The normal range for inter-arm differences in blood pressure In a healthy animal, the blood pressure normal for its species is maintained within a certain range with great constancy. Thus if blood pressure is Blood pressure: information about, high blood pressure, symptoms The normal range for inter-arm differences in blood pressure - Statistical Data Included from Age and Ageing in Health provided free by Find Articles. The normal range for inter-arm differences in blood pressure A blood pressure level of 140/90 mmHg or higher is considered high. About two-thirds of people over age 65 have high blood pressure. If your blood pressure What Are High Blood Pressure and Prehypertension? Stage I high blood pressure ranges from 140/90 to 159/99. This often occurs as people age. High blood pressure speeds this process. Adult Health Advisor 2005.4: High Blood Pressure (Essential Scientific studies show that the blood pressure increases with age. Of course, the age of a patient cannot be altered but the doctor must consider the age Blood pressure and age The range of normal blood pressure readings varies according to several factors including exercise level, age, medical history and health status. High Blood Pressure More than half of Americans over age 60 have high blood pressure. But, that does not mean it is part of normal aging. Try these healthy habits to help you Medindia.net - Blood Pressure charts A typical blood pressure reading for an adult might be 118/78 mm Hg, but readings vary depending on age and other factors. Normal blood pressure is defined |
| blood pressure range by age |
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