Coronary Heart Disease

Question 1

what is the job of the coronary arteries?

Answer 1

to supply the heart muscle with blood - which provides the glucose and oxygen needed for aerobic respiration and removes the carbon dioxide produced by aerobic respiration

Question 2

what causes the build up of fatty deposits in the artery walls?

Answer 2

lots of saturated fats in your diet

Question 3

what do the fatty deposits do to the lumen or your arteries?

Answer 3

it narrows them which then restricts blood flow to the heart muscles cells

Question 4

what happens when the heart muscle cells receive less blood?

Answer 4

• the heart muscle cells receive less oxygen and glucose for aerobic respiration
• this means it reduces and anaerobic respiration increases in the muscle cells
• lactic acid builds up, which poisons the heart muscle cells, which then causes heart attacks

Question 5

risk factors which make coronary heart disease more likely?

Answer 5

• diet - eating lots of saturated fat increases blood cholesterol and increases the risk of fatty deposits
• smoking - increases blood pressure and increases the risk of fatty deposits forming
• high blood pressure - damages the artery lining and increases the risk of fatty deposits forming - high salt levels in your diet increase the risk of high blood pressure
• obesity - being obese will increase blood pressure and may be linked to poor diet
• lack of exercise - causes high blood pressure