SMOKING ..... and how it contributes to heart disease?!?!?!!?I really can't answer this! plz help thanks :)
Two non-smoking men with low blood pressure both have plasma cholesterol concentrations of 5mmol per litre. One of them starts to smoke and the plasma cholesterol concentration of the other increases to 7 mmol per litre. Which man is now at the greater risk from heart disease and why?
Cyan
The smoking man is at higher risk of heart disease. He has a higher concentration of cholesterol, and higher cholesterol concentration leads to greater risk of heart disease (when above the healthy amount of cholesterol), as it reduces the cross-sectional area of some important blood vessels.
Eternal Cynic
Yes, the one who starts smoking is at a higher risk of heart disease as his cholesterol concentration increases which importantly leads to atherosclerosis (the all-important term in Biology).
Atherosclerosis refers to the build-up of cholesterol on the walls of the heart valves. This greatly reduces the size of the lumen of the heart valve, and thus, blood is unable to be fully and effectively transported to the heart - leading to a heart attack.
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