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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Relationship of blood pressure, heart rate and behavioral mood Relationship of blood pressure, heart rate and behavioral mood state to norepinephrine kinetics in younger and older men following caffeine ingestion Relationship between blood pressure and heart-rate variability Relationship between blood pressure and heart-rate. q. Y Yokoi and K Aoki. Acta Physiol Scand 1999, 165, 155a161. 156. ƒ 1999 Scandinavian Physiological Heart rate-arterial blood pressure relationship in conscious rat This experiment quantified the initial disruption and subsequent adaptation of the blood pressure (BP)-heart rate (HR) relationship after spinal cord CiNii - RELATIONSHIP BETWEEN BLOOD PRESSURE AND HEART RATE WHILE Blood pressure (BP) and heart rate (HR) (BP waveforms) are affected by external stress during waking and BP is reduced to its lowest level (base BP) during Determining the relationship of heart rate and blood pressure They found a 0. . phase relationship for heart rate and blood. pressure, precisely the oscillations were in phase for peak blood pressure frequencies. Our IngentaConnect Importance of the blood pressure-heart rate Importance of the blood pressure-heart rate relationship. Authors: FOLKOW B.; ELY D. Source: Blood Pressure, Volume 7, Number 3, 25 August 1998 , pp. Relationship of resting blood pressure and heart rate to Relationship of resting blood pressure and heart rate to experienced anger and expressed anger. HS Goldstein, R Edelberg, CF Meier and L Davis Relationship of Resting Blood Pressure and Heart Rate to Relationship of Resting Blood Pressure and Heart. Rate to Experienced Anger and Expressed Anger. HARRIS S. GOLDSTEIN, MD, D MED SC, ROBERT EDELBERG, PHD, Blood pressure - Wikipedia, the free encyclopedia The more blood present in the body, the higher the rate of blood return to the heart and the resulting cardiac output. There is some relationship between Inverse relationship between heart rate and blood pressure Inverse relationship between heart rate and blood pressure variabilities in rats. AU Ferrari, A Daffonchio, F Albergati and G Mancia heart rate and blood pressure relationship - Heart Disease - MedHelp This is a discussion on MedHelp about heart rate and blood pressure relationship. Community members of MedHelp provide help, support, guidance and |
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