Edexcel IGCSE Biology 2.49 Biological Consequences of Smoking Questions

Connect smoking with lung cancer, lung damage, reduced oxygen transport and coronary heart disease, including artery narrowing.

Exam points

Explain how lung damage and carbon monoxide from smoking reduce gas exchange or oxygen transport.
Explain how smoking can cause coronary heart disease through artery narrowing, blood-vessel damage or clot formation.
Explain why age affects lung-cancer likelihood, including longer exposure to smoking and age-related cancer risk.

[Maximum number: 3]

The diagram shows parts of the human respiratory system with some structures labelled.

Figure for Question Edexcel IGCSE Biology 2.49 Biological Consequences of Smoking Questions question 1 — Edexcel IGCSE Biology

A scientist compared the rate at which oxygen is used during exercise by a person who is a non-smoker with a person who is a smoker.

The rate is measured in $\mathrm{cm}^{3}$ per minute for each kilogram of body mass.
The table shows the scientist's results.

Table for Question Edexcel IGCSE Biology 2.49 Biological Consequences of Smoking Questions question 1 — Edexcel IGCSE Biology

Explain the effect of cigarette smoking on the rate at which oxygen is used.

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Edexcel IGCSE Biology 2.49 Biological Consequences of Smoking Questions question 1