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.

blood pressure changes
Genes affecting blood pressure change as children become adults
As children transform into adults some of the genes involved in controThe study of black and white identical and fraternal twins showed that.

High Blood Pressure - hypertension, symptoms, causes, beta
Your blood pressure rises and falls with each heartbeat, even normal blood pressure does this. These levels can change with everyday activity, for example,

Internal Clock Causes Morning Blood Pressure Changes
Internal Clock Causes Morning Blood Pressure Changes PHILADELPHIA, PA Á“ February 22, 2007 -- It has been known for decades that heart attacks and strokes

Introduction: Low Blood Pressure: Merck Manual Home Edition
When sensors detect a change in blood pressure, they trigger a change in one of the compensatory mechanisms and so maintain a steady blood pressure.

Blood Pressure Changes With Acupuncture Comparable to Those With
Duration of abstinence, psychiatric comorbidity, and High-Risk Alcoholism Relapse score were linked to alcohol relapse in patients with alcoholic cirrhosis

Blood pressure symptoms - WrongDiagnosis.com
High blood pressure (184), Blood pressure changes (4), Wide pulse pressure (1), Low blood pressure (134), Excessively reduced blood pressure, Severe drop in

Blood Pressure Changes Causes - Changes In Blood Pressure
Blood Pressure Causes - Blood pressure monitoring - Your healthcare provider may take your blood pressure when you visit the office to check for changes in

What is blood pressure?
Blood pressure changes during the day. It is lowest as you sleep and rises when you get up. It also can rise when you are excited, nervous, or active.

Hypertension (High Blood Pressure)
Blood pressure changes from minute to minute and is affected not only by activity and rest, but also by temperature, diet, emotional state, posture,

Blood pressure - Wikipedia, the free encyclopedia
A full bladder can change your blood pressure reading.Á« A comprehensive fact sheet - "How to Measure Your Blood Pressure" is available from the Blood

High Blood Pressure - Things you can do to help lower yours
When the cause isn't known, the high blood pressure is called essential hypertension. Your blood pressure changes often during the day depending on many

ADHD Medications and Treatments: Blood Pressure Changes with ADHD
While there is little evidence of significant blood pressure changes in children treated with ADHD medications, less is known about adults who are at a

About High Blood Pressure
Your blood pressure rises with each heartbeat and falls when your heart relaxes between beats. Your blood pressure can change from minute to minute,

Blood pressure change with weight loss is affected by diet type in
Blood pressure change with weight loss is affected by diet type in men1,2,3. Caryl A Nowson, Anthony Worsley, Claire Margerison, Michelle K Jorna,

High blood pressure: Lifestyle changes to control it - MayoClinic.com
High blood pressure: Lifestyle changes are an essential part of controlling this condition.

Blood pressure changes during sexual stimulation, ejaculation and
Blood pressure. Blood pressure changes, mmHg. Positive tests. Negative tests Blood pressure changes. P. ercentage of patients. Positive tests N=34

Nocturnal blood pressure changes in patients with restless legs
Objectives: To assess heart rate (HR) and blood pressure (BP) changes associated with periodic leg movements during sleep (PLMS) with or without EEG signs

Blood pressure in more detail
A doctor would quote patients blood pressure as the value of the systolic pressure over the value of the diastolic pressure. This value changes from

Acupuncture Software - Practice management & Reference software
Blood pressure is not always constant, and its rate of change is different Even a healthy person's blood pressure changes dramatically during a day.


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