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Cholesterol is a soft, waxy substance found in all parts of the body.
It helps form cell membranes and is involved in production of some hormones and vitamin D.
Excess cholesterol can build up in the arteries, narrowing them and slowing or
blocking blood flow to the heart. To learn more, take this quiz based on information from the National Heart,
Lung and Blood Institute and the American Heart Association.
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Test your knowledge of first aid by taking this quiz.
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There is an epidemic of obesity in this country, health experts say. But what is obesity? How is it measured? Find out the answers to these questions and others by taking this quiz, based on information from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
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Slow traffic. Screaming children. A job interview. A crumbling marriage. Any of these could be a stressful situation. We all face stress in our lives, and some days are more stressful than others. Stress can take its toll on our physical and mental health. Learn more about stress and its effects by taking this multiple-choice quiz.
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Find out how much you know about strokes and what causes them.
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Stroke is the third leading cause of death after heart disease and cancer and a
leading cause of serious, long-term disability, according to the American Heart Association (AHA). Strokes kill about 157,000 people a year, accounting for about 1 of every 15 deaths. Find out more about stroke by taking this quiz, based on information from the AHA and the National Institute of Neurological Disorders and Stroke (NINDS).
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