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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Blood Pressure, physiology Ambulatory blood pressure (ABPM) was performed using ambulatory blood pressure monitor: BR--102 monitor f. Schiller. The renal length was assessed using Control of Arterial Blood Pressure The blood pressure is the force that causes blood to flow through the The blood pressure is determined by the rate of blood flow produced by the heart systolic blood pressure (physiology) -- Britannica Online Encyclopedia systolic blood pressure (physiology). Encyclopædia Britannica : Related Articles. A selection of articles discussing this topic. blood pressure Blood pressure - Wikipedia, the free encyclopedia 1.2 Invasive measurement; 1.3 Home monitoring; 1.4 Taking accurate home blood pressure readings. 2 Normal Values; 3 Physiology. 3.1 Regulation Arterial blood pressure When blood pressure is measured using a sphygmomanometer, the upper value is the systolic pressure and the lower value is the diastolic pressure. Hypertension Introduction Click here for information on Cardiovascular Physiology Concepts, High blood pressure, termed "hypertension," is a condition that afflicts almost 1 Module 9, Blood Pressure Physiology Module 9, Blood Pressure Physiology. Objectives · Whole Text Index · Quick Study Index · Self-Assessment - Questions · Self-Assessment - Answers Blood Pressure - Basic Anatomy & Physiology of the vascular system Blood pressure is an important topic in the study of health and the body. Blod pressure is included in the IvyRose Holistic Health section about the human Cardiovascular System / Blood / Physiology of Circulation Classification & Structure of Blood Vessels | Physiology of Circulation | Circulatory In common usage, the term blood pressure refers to arterial blood The Human Circulatory System II The medical term for high blood pressure is hypertension. Near the venous end of a capillary, the blood pressure is greatly reduced (to about 15 torr). blood pressure, or arterial blood pressure (physiology aging process, defecation, diet, drugs and drug action, pregnancy, autonomic nervous system, peripheral control, shock reaction, skin, disease, shock, |
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