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. |
| autonomic control of blood pressure |
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Electrical stimulation of abdominal muscles for control of blood Autonomic dysreflexia is a common complication of spinal cord injury above The subject had learned to control his own blood pressure by adjusting his Effect of chromogranin A on central autonomic control of blood We investigated the effect of exogenous chromogranin A (CgA) on central autonomic structures involved in the control of blood pressure. Influence of Autonomic Impairment on Blood-Pressure and Heart-Rate spinal cord injury experience loss of autonomic control of vascular control on the scaling structure of blood pressure. and heart rate. heart rate and blood pressure variability Simple techniques can be used to assess certain aspects of the autonomic control of heart rate and blood pressure. Recently, techniques measuring the Autonomic and Neurohumoral Control of Postprandial Blood Pressure Autonomic control of cardiovascular function was assessed using power spectral analysis of blood pressure and heart rate variability, and neurohumoral International Journal of Cardiology : Frequency-dependent Use of spectral analysis of heart rate and blood pressure variability to assess autonomic and baroreflex control; 2.8. Statistical analysis. 3. Results Impaired autonomic control of heart rate and blood pressure in on autonomic control of blood pressure dynamics. Hypertension. 1999; 33:1195-1200. 46. Veerman DP, Imholz BPM, Wieling W, et aL Effects of aging on Is There a Glycemic Threshold for Impaired Autonomic Control? Interventions that reduce blood pressure or body fat may therefore be associated with improved autonomic control independently of parallel improvements in Autonomic control of blood pressure in mice: basic physiology and Second, we focus on the integrative role of autonomic nerves in control of blood pressure in the mouse, and finally, we depict the opportunities and Autonomic control of blood pressure and heart rate in obese Autonomic control of blood pressure and heart rate in obese hypertensive dogs. A. A. Truett, A. T. Borne, M. A. Poincot and D. B. West Effects of Age and Gender on Autonomic Control of Blood Pressure The purpose of this study was (1) to quantify age- and gender- related alterations in autonomic control of blood pressure (BP) and (2) to examine the impact Cardiac Autonomic Control Buffers Blood Pressure Variability Another approach to studying the relationship be-. tween cardiac autonomic control and BPV involves the. use of ambulatory blood pressure monitoring. Cardiac Autonomic Control Buffers Blood Pressure Variability The model proposes that autonomic control of the heart exerts a buffering or inhibitory influence on oscillations in blood pressure. IngentaConnect Age-Related Decline in Autonomic Control of Blood Autonomic control of blood pressure appears to decline with age giving rise to an increased risk of orthostatic hypotension and major hypotensive reactions Control of Arterial Blood Pressure The autonomic nervous system is the most rapidly responding regulator of blood pressure and receives continuous information from the baroreceptors (pressure The Autonomic Nervous System (page 1) Autonomic nerves constitute all of the efferent fibres which leave the CNS, in the control of heart rate, blood pressure and respiratory activity. Introduction: Low Blood Pressure: Merck Manual Home Edition The body has several compensatory mechanisms that control blood pressure (see High disorders (a condition called autonomic nervous system failure). |
| autonomic control of blood pressure |
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