O-LevelBiologyTransport in Humans5090/12 · May/June 2018 · Q171 Mark

Two people of equal body mass do the same amount of exercise. One person is in good health. The other person has emphysema. The rate of oxygen entering each person's blood in the lungs is measured. The results are shown in the table. [Figure 17] Which statement explains these results?

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AThe healthy person has a faster breathing rate.

BThe healthy person has a smaller lung volume.

CThe person with emphysema has damaged alveoli.

DThe person with emphysema has larger alveoli.

✓ Correct answer

C: The person with emphysema has damaged alveoli.

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2018 Paper 1 Variant 2, question 17.

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