A-LevelBiologyGas exchangeFeb/Mar 2021Paper 1 Q361 Mark
Emphysema is a type of chronic obstructive pulmonary disease (COPD). A person with emphysema has difficulties in breathing out. Why does emphysema cause difficulties in breathing out?
ASmooth muscle fibres in the airways are destroyed.
BToo little mucus is produced in the bronchi.
CThe elasticity of the alveoli decreases.
DThe surface area of the alveoli becomes larger.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of gas exchange within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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