Coronary heart disease & lifestyle
Edexcel GCSE Biology revision on Coronary heart disease & lifestyle. Aligned to the Pearson Edexcel GCSE Biology 1BI0 specification. This bank has 25 practice questions on this topic.
Sample questions (3 of 25)
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Question 1
Which component of the diet is most directly responsible for the build-up of fatty deposits in the coronary arteries?
- A) Excessive dietary fibre
- B) High levels of cholesterol
- C) Increased protein intake
- D) High complex carbohydrate
Show answer
Answer: High levels of cholesterol
Coronary heart disease involves the narrowing of coronary arteries due to the build-up of fatty material, specifically cholesterol. High levels of dietary cholesterol or saturated fats contribute to the formation of plaque, which restricts blood flow to the heart muscle. Other nutrients listed do not directly contribute to arterial plaque formation in the same way.
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Question 2
What is the primary physiological consequence of a blocked coronary artery on the heart muscle?
- A) Increased blood pressure
- B) Reduced oxygen delivery
- C) Excessive carbon dioxide
- D) Decreased heart rhythm
Show answer
Answer: Reduced oxygen delivery
The heart muscle requires a constant supply of oxygen for aerobic respiration to release energy. When coronary arteries are blocked by fatty deposits, the flow of oxygenated blood is severely restricted or stopped. Without sufficient oxygen, the heart muscle cells cannot respire effectively, which can lead to tissue damage or a heart attack.
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Question 3
Which medical device is used to physically widen a narrowed coronary artery to restore blood flow?
- A) Artificial heart valve
- B) Small metal wire stent
- C) Pacemaker device unit
- D) Synthetic bypass graft
Show answer
Answer: Small metal wire stent
Stents are wire mesh tubes that are inserted into narrowed coronary arteries to keep them open and ensure adequate blood flow. They are a common non-surgical intervention for coronary heart disease. Other options like artificial valves or pacemakers serve different functions related to heart rhythm or valve integrity rather than arterial narrowing.
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22 more questions on Coronary heart disease & lifestyle — plus mistakes tracking and spaced repetition across the whole Biology spec.