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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ScienceDirect - Seminars in Pediatric Infectious Diseases : Ear
Ear pain, fever, and altered mental status in an 8-year-old boy respiratory rate was 55 per minute and blood pressure was 120/40 mm Hg. He appeared well

wax, boogers, and phlegm: Ear pain
The main point: ear pain is a thorny, complex problem, and the only hope we have of figuring these out is There's a blood pressure spike with sneezing.

Airplane ear - CNN.com
Ear pain associated with flying is due to unequal pressure between your middle ear heart rhythm disorders or high blood pressure or you've experienced

NEJM -- Case 34-2007 -- A 77-Year-Old Man with Ear Pain
That evening, pain, accompanied by drainage, developed in the right ear; The blood pressure was 140/94 mm Hg, the pulse 160 beats per minute,

Ear pain/ringing/pressure - HealingWell.com Forum
Well not necissarily pain but ringing (a steady tone) on and off (tinnitus?). esp after getting up after sitting down (blood pressure change?

Home Remedies For Ear pain
Need a home remedy for ear pain or an earache? Use ollive oil, garlic, Hypertension - High Blood Pressure · Hypodermic Hemorrhage - Blue Marks

Syncope associated with pain as the presenting feature of neck
He continued to experience occasional left ear pain until two months later, Blood pressure responses to isometric exercise, mental arithmetic,

Ear pain - Yahoo! Health
This is called referred pain. The incidence of referred ear pain increases with in the middle ear to equalize with atmospheric pressure outside the ear.

Ear barotrauma - DrKoop.com
Barotitis media; Barotrauma; Ear popping; Pressure-related ear pain; High Blood Pressure, Hormonal, Immune Disorders, Immunizations/Vaccines, Impotence

Ear Pain, Scuba Diving
Some divers call it ear squeeze. The pain occurs because of differences in pressure between the middle ear and the outside environment.

Weather Changes Cause Ear Pain
Weather Changes Cause Ear Pain. It can aggravate high blood pressure and cause insomnia or sleepiness. Even though Sudafed is a nonprescription drug,


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