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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Macular Degeneration types and risk factors Higher pulse pressure and lower diastolic blood pressure may therefore be markers for degenerative changes occurring in eyes that are at risk for wet Eye Examination You will come to find eye examinations are a painless and informative method for One usually assumes that taking one's blood pressure is a general Eye Exams - High Blood Pressure Symptoms - Diabetes Symptoms Eye Exams & High Blood Pressure: An eye exam can reveal high blood pressure symptoms and diabetes symptoms and reflect the risk of a future stroke or heart Blurry Eyes Signaled Dangerously High Blood Pressure ÁœBlurryÁ« Eyes Signaled Dangerously High Blood Pressure. It was supposed to have been a routine eye exam for a patient who had complained that his vision Blood pressure and diabetes Many people with diabetes have sore or watery eyes, and blood pressure tablets may make these worse. However, it is better to have sore/watery eyes than Eyes Help Predict High Blood Pressure Want to know if you're likely to develop high blood pressure? The answer may lie in your eyes. High blood pressure dangers: Hypertension's effects on the body Tiny, delicate blood vessels supply blood to your eyes. Like other vessels, they, too, are vulnerable to the damage of high blood pressure: Hypertensive Retinopathy: high blood pressure and eye disease Hypertension can cause damage to the blood vessels in the retina, the condition known as hypertensive retinopathy. High Blood Pressure - Impact on Eyes High blood pressure can eventually cause blood vessels in the eye to burst or bleed. Vision may become blurred or otherwise impaired and can result in Can High Blood Pressure Harm Eyes? High blood pressure (hypertension) can harm your eyes in a number of very serious ways. Understanding how hypertension may cause vision loss will hopefully Eye disease and high blood pressure - hypertensive retinopathy - WebMD Hypertension can cause damage to the blood vessels in the retina, the area at the back of the eye where images focus. This condition is known as |
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