cardiovascular system health

what is bad cholesterol

Cholesterol cant dissolve in the blood. It has to be transported to and from the cells by carriers called lipoproteins. Low-density lipoprotein, or LDL, is known as "bad" cholesterol. High-density lipoprotein (HDL) is known as good cholesterol. When too much LDL cholesterol circulates in the blood, it can slowly build up in the inner walls of the The USDAs MyPyramid recommends that you limit the amount of such foods in your diet to occasional treats. arteries that feed the heart and brain. Together with other substances, it can form plaque, and lead to atherosclerosis. If a clot forms and blocks a narrowed artery, a heart attack or stroke can result. Cholesterol comes from the food you eat as well as being made by the body. To lower bad cholesterol, a diet low in saturated fat and dietary cholesterol should be followed. Regular aerobic exercise also lowers LDL cholesterol and increases HDL cholesterol.

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keeping your cardiovascular system healthy

There are many risk factors that can cause a person to develop cardiovascular disease. A risk factor is anything that is linked to an increased chance of developing a disease. Some of the risk factors for cardiovascular disease you cannot control, but there are many risk factors you can control. Risk factors you cannot control include: Age: The older a person is, the greater their chance of developing a cardiovascular disease. Gender: Men under age 64 are much more likely to die of coronary heart disease than women, although the gender difference decreases with age. Genetics: Family history of cardiovascular disease increases a persons chance of developing heart disease. Risk factors you can control include many lifestyle factors: Tobacco smoking: Giving up smoking or never starting to smoke is the best way to reduce the risk of heart disease. Diabetes: Diabetes can cause bodily changes, such as high cholesterol levels, which are are risk factors for cardiovascular disease. High cholesterol levels: High amounts of "bad cholesterol," increase the risk of cardiovascular disease. Obesity: Having a very high percentage of body fat, especially if the fat is mostly found in the upper body, rather than the hips and thighs, increases risk significantly. High blood pressure: If the heart and blood vessels have to work harder than normal, this puts the cardiovas- cular system under a strain. Lack of physical activity: Aerobic activities, such as the one pictured below ( Figure 1.1), help keep your heart healthy. To reduce the risk of disease, you should be active for at least 60 minutes a day, five days a week. Poor eating habits: Eating mostly foods that do not have many nutrients other than fat or carbohydrate leads to high cholesterol levels, obesity, and cardiovascular disease ( Figure 1.2). 60 minutes a day of vigorous aerobic activity, such as basketball, is enough to help keep your cardiovascular system healthy.

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instructional diagrams

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questions

smoking is one of the biggest risk factors for cardiovascular disease.

-->  a. true

b. false

the older a person is, the greater their chance of developing a cardiovascular disease.

-->  a. true

b. false

what is the best way to reduce the risk of heart disease?

a) having low cholesterol levels

b) getting plenty of exercise

-->  c) not smoking

d) eating properly

poor eating habits can result in

a) high cholesterol levels.

b) cardiovascular disease.

c) obesity.

-->  d) all of the above

too much ldl cholesterol can lead to

a) atherosclerosis.

b) a heart attack

c) a stroke.

-->  d) all of the above

which risk factor strains the cardiovascular system?

a) high cholesterol levels

-->  b) high blood pressure

c) high tobacco use

d) high age

to reduce the risk of disease, you should be active for at least

a) 30 minutes a day, three days a week.

b) 30 minutes a day, five days a week.

-->  c) 60 minutes a day, five days a week.

d) 60 minutes a day, three days a week.

diagram questions

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