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 80
What Is High Blood Pressure?
If your blood pressure is 120/80, you say that it is "120 over 80. A blood pressure of 130/80 mmHg or higher is considered high blood pressure in people

What Is Blood Pressure? Guide to Lowering HBP
For example, a blood pressure measurement of 120/80 mmHg (millimeters of Normal blood pressure is less than 120 mmHg systolic and less than 80 mmHg

What is blood pressure?
That level should be lower than 120/80. When the level stays high, 140/90 or higher, you have high blood pressure. With high blood pressure, the heart works

Taking a blood pressure
Example - Take a person with a blood pressure of 120/80. The first number always represents systolic pressure (120), and the second number diastolic

High Blood Pressure and Kidney Disease
Your blood pressure is considered normal if it stays below 120/80 (expressed as "120 over 80"). People with a systolic blood pressure of 120 to 139 or a

Hypertension (High Blood Pressure)
Blood pressure is measured in millimeters of mercury (written as mm Hg). For example, normal blood pressure in adults should be less than 120/80 mm Hg. The

High Blood Pressure (Hypertension)
For example: 120/80 (120 over 80) means that the systolic pressure is 120 and the diastolic pressure is 80. As kids grow, their blood pressure increases

Blood Pressure
Blood pressure below 120 over 80 mmHg (millimeters of mercury) is considered optimal for adults. A systolic pressure of 120 to 139 mmHg or a diastolic

About High Blood Pressure
Your heart beats about 60 to 80 times a minute under normal conditions. Your blood pressure rises with each heartbeat and falls when your heart relaxes

Blood Pressure Monitoring at Home -- familydoctor.org
Blood pressure measurement is made up of both the systolic and the diastolic pressure. It is normally written like this: 120/80, with the systolic number

High Blood Pressure: Things You Can Do to Help Lower Yours
Blood pressure is really two measurements, separated by a slash when written down, such as 120/80. You may also hear someone say a blood pressure is "120

I have low blood pressure (80/50) and my Dr. said to drink more
"I have low blood pressure (80/50) and my Dr. said to drink more?" - Find the answer to this question and millions more on Yahoo!7 Answers.

Low Blood Pressure (Hypotension) Causes, Symptoms, Diagnosis, and
By convention, an individual's blood pressure is expressed as systolic/diastolic blood pressure, for example, 120/80.The systolic blood pressure (the top

High Blood Pressure (Hypertension) - Texas Heart Institute Heart
Those with a blood pressure reading anywhere from 120/80 up to 139/89 (once thought to be normal) are now classified within a category called

US guidelines say blood pressure of 120/80 mm Hg is not "normal
Most patients will need two drugs to lower their blood pressure to <140/90 mm Hg (or <130/80 mm Hg for patients with diabetes or chronic kidney disease).

Blood Pressure Chart - Normal Blood Pressure Range
120 - 80 - NORMAL Blood Pressure 110 - 75 - Low Normal 90 - 60 - BORDERLINE LOW 60 - 40 - TOO LOW Blood Pressure 50 - 33 - DANGER Blood Pressure

DHDSP - About High Blood Pressure
Normal blood pressure is a systolic blood pressure of less than 120 mmHg and a diastolic blood pressure of less than 80 mmHg.

Publications
This is the diastolic pressure. If your blood pressure is normal, your systolic pressure is less than 120 and your diastolic pressure is less than 80â”for

Hypertension - Wikipedia, the free encyclopedia
The Mayo Clinic website specifies blood pressure is "normal if it's below 120/80" but that "some data indicate that 115/75 mm Hg should be the gold standard


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