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    胆固醇
运行环境: Win9x/NT/2000/XP/2003 文件大小: 2256 K
资源格式: Flash动画 资源等级: ★★★★
开 发 者: www.healthcentral.com 资源语言: 英文
所属分类: 心血管内科学 资源属性:     
下载次数: 726
资源添加: 审核:myworld21 录入:admin 添加时间: 2007-7-3
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精彩的三维演示

英文解说词:Cholesterol

Cholesterol is a soft, fat-like, waxy substance found in the bloodstream and in all your body's cells.

The cholesterol in a person's body originates from two major sources, dietary intake and production in the liver.

When fatty foods are ingested the cholesterol particles from the food enter the small intestine.

The luminal surface of the small intestine is covered by small projections called villi, which absorb the cholesterol particles and transport them into the blood stream.

The cells in the liver use an enzyme called HMG Co A Reductase for synthesizing cholesterol.

Cholesterol does not dissolve in the blood but is carried to the cells via lipoproteins, Low-density lipoproteins - LDL and High-density lipoproteins - HDL. Excessive LDL can clog arteries causing heart-attacks or strokes. HDL is generated by the body to remove cholesterol from the bloodstream and reduces the risk of heart attack or stroke.

Statins are the most widely used medication for lowering cholesterol.

These are HMG Co A Reductase inhibitors that reduce the body's internal cholesterol production.


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