Gas exchange in humans — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
Exchange surfaces, inspired/expired air and activity-related breathing control are required. Detailed intercostal/pressure ventilation mechanics, tracheal cartilage and goblet-cell mechanisms extend the listed outcomes.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge 0654 syllabus2028–2029 · B11.1.1–7
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