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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AGE, SEX AND SPECIES VARIATIONS ON BLOOD PRESSURE IN NORMAL RATS AGE, SEX AND. SPECIES. VARIATIONS. ON BLOOD. PRESSURE. IN. NORMAL. RATS. HAROLD S. MEDOFF. AND. ALFRED. M. BONGIOVANNP. From the Wistar Institute, The Effect of Age, Blood Pressure and Gender on the Incidence of PVC prevalence increased with age in both the apparently normal group (p<0.001), Systolic blood pressure was also associated with PVC prevalence How being older affects your blood pressure - CNN.com Why you're more susceptible to high blood pressure as you age systolic and diastolic pressure rise above normal levels, you have high blood pressure. The normal range for inter-arm differences in blood pressure The normal range for inter-arm differences in blood pressure - Statistical Data Included from Age and Ageing in Health provided free by Find Articles. Blood Pressure Even More Strongly Associated with Cardiovascular This meta-analysis clearly shows that for people of all ages, lowering blood pressure levelsāeven levels that are in the normal ageācan significantly reduce Thresholds for normal blood pressure and serum cholesterol Thresholds for normal blood pressure and serum cholesterol practice in 2003.5 These suggest blood pressure above 140/90 mm Hg, with no age correction, Normal blood pressure has any thing to do with age? - Yahoo! Answers Normal blood pressure has any thing to do with age? Johns Hopkins: Hypertension|Stroke on high blood pressure|stroke In a decades-long study of nearly 5000 adults age 55 and older, researchers found that men and women with normal blood pressure (less than 120/80 mm Hg) Uncontrolled High Blood Pressure Means More Cognitive Problems In The researchers speculate that high blood pressure somehow exacerbates the normal effects of age on the frontal lobes, making it even harder to quickly What Are High Blood Pressure and Prehypertension? Inhibitors, Normal Blood, Pressure, Optimal Blood, Pressure Those who do not have high blood pressure at age 55 face a 90 percent chance of developing Child Blood Pressure - DrGreene.com - caring for the next generation Taller children have higher normal blood pressures than shorter children of the same age. For an average 5 year old girl, a normal blood pressure would be Blood pressure: information about, high blood pressure, symptoms In a healthy animal, the blood pressure normal for its species is maintained Blood pressure increases with age because the arteries loose elasticity. Publications 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 NHLBI Study Finds High-Normal Blood Pressure Increases The adverse effects of high-normal blood pressure held for both men and women and at all ages, although it was especially high for those age 65 and older. THE CHANGING APPROACH TO EVALUATING BLOOD PRESSURE Additionally, as people age, their blood vessels stiffen; that was thought to be "normal" and the dictum was that the acceptable systolic blood pressure was Measuring the Blood Pressure 'Normal' or 'acceptable' blood pressure varies with age, state of health and clinical situation. At birth, a typical blood pressure is 80/50 mmHg. Blood pressure normal? Maybe now it isnāt. What was classified as normal or high-normal blood pressure (a systolic pressure over age 50, systolic is more important than diastolic blood pressure. Measuring Blood Pressure, what the numbers mean. This is why it is important to have your blood pressure checked regularly. Even if your blood pressure is 'normal', ie, below 140/90mmHg, High blood pressure (hypertension) A typical normal blood pressure reading would be 120/80 mmHg. What's classed as high? There is a natural tendency for blood pressure to rise with age due to |
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