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5.4 Non-communicable diseases

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Question 1
F

The Figure shows a cross-section of a healthy coronary artery and a cross-section of a coronary artery from a person who has smoked for many years.

Figure

image

a.

Name substance X.

[1]
b.

Coronary arteries supply blood to the heart muscle.

Explain how the narrowing shown in the Figure could lead to a heart attack.

[3]
c.

Explain how smoking increases the risk of this narrowing.

[2]
d.

Carbon monoxide in cigarette smoke combines with haemoglobin in red blood cells.

Explain why this puts extra strain on the heart.

[2]
Markscheme

5.4 Non-communicable diseases Questions

  1. GCSE
  2. /Biology
  3. /5.4 Non-communicable diseases

44 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.

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