Flashcards · Biology · Non-communicable Diseases
Non-communicable Diseases and their Causes
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What is a non-communicable disease?
A disease that is not caused by a pathogen and cannot be passed on.
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Give four groups of non-communicable disease.
Cardiovascular diseases, cancers, lung and liver diseases, and diseases influenced by nutrition.
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Give two examples of lung disease caused by smoking.
Emphysema and chronic bronchitis.
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Which liver disease can be caused by alcohol?
Cirrhosis.
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Name a deficiency disease.
Scurvy, from a lack of vitamin C.
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What is a risk factor?
Something that increases the chance of a disease.
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Does having a risk factor mean a person will get the disease?
No, it only makes it more likely.
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Name three types of risk factor.
Genes, lifestyle and the environment.
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What does a positive correlation show?
Both variables rise together.
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Does a correlation prove a cause?
No, another factor may be responsible, or it may be chance.
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What makes a cause more likely?
Large studies, repeated results, a dose effect and a known mechanism.
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Why does a larger sample help?
It gives more reliable results.
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Why are non-communicable diseases rising worldwide?
People live longer, and diets and lifestyles are changing.
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What do non-communicable diseases cost a country?
Billions of pounds in health care.
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Give an example of a law to reduce risk.
The ban on smoking in enclosed public places.
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Common mistake about risk factors?
Saying that smoking always causes cancer. It increases the risk, but not every smoker gets cancer.