BI-2270
Coronary heart disease
Biology · Secondary 4 · Medium · Coronary heart disease
A person smokes regularly. Which statement best explains how this increases his risk of coronary heart disease?
- It widens coronary arteries, increasing blood flow to the heart
- It causes fatty deposits in coronary arteries, reducing blood flow
- It increases the number of red blood cells in the coronary arteries
- It makes the heart stop beating whenever he smokes
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