Coronary heart disease & lifestyle
AQA GCSE Biology revision on Coronary heart disease & lifestyle. Aligned to the AQA GCSE Biology 8461 specification. This bank has 25 practice questions on this topic.
Sample questions (3 of 25)
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Question 1
What is the primary cause of coronary heart disease regarding the coronary arteries?
- A) Thickening of the heart wall
- B) Buildup of fatty material
- C) Leaking of the heart valves
- D) Infection of blood vessels
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Answer: Buildup of fatty material
Coronary heart disease occurs when layers of fatty material build up inside the coronary arteries. This buildup narrows the lumen of the arteries, restricting the flow of oxygenated blood to the heart muscle cells.
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Question 2
Which specific substance is most directly responsible for the initial formation of plaques in coronary arteries?
- A) Glucose
- B) Protein
- C) Cholesterol
- D) Platelets
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Answer: Cholesterol
Cholesterol is a lipid that can accumulate in the walls of the coronary arteries. When these deposits form, they create a plaque that restricts blood flow, increasing the risk of heart attacks.
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Question 3
How does a stent improve blood flow in an individual with coronary heart disease?
- A) By widening the artery lumen
- B) By replacing the damaged valve
- C) By removing the fatty deposit
- D) By lowering blood pressure
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Answer: By widening the artery lumen
Stents are metal mesh tubes inserted into narrowed coronary arteries. Once expanded, they mechanically hold the artery open, allowing blood to flow freely to the heart muscle.
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22 more questions on Coronary heart disease & lifestyle — plus mistakes tracking and spaced repetition across the whole Biology spec.