plumiThe mammalian lung: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 2.1.2 The mammalian lung, 2019–2025, with mark schemes and examiner’s reports where available.
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Q3(d)
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All 5 questions on The mammalian lung, as a list
- October 2022, AS Unit 1, Q3(d) (3 marks): Deoxygenated blood is taken to the lungs and oxygenated blood is taken away from the lungs. Complete the graph to show the changes in partial pressure of oxygen
- October 2022, AS Unit 1, Q5(c) (3 marks): The properties of gas exchange surfaces include: • a large surface area • a short diffusion distance • a high concentration gradient. Describe how mammalian lun
- January 2021, AS Unit 1, Q6(a)(ii) (2 marks): Smoking is a cause of emphysema. People with emphysema have weakened alveoli that can collapse, creating fewer but larger alveoli. Explain how this will affect
- January 2020, AS Unit 1, Q7(b)(i) (1 mark): Suggest why the partial pressure of oxygen in the air in the alveoli is lower than in the atmosphere. (1)
- January 2019, AS Unit 1, Q8(b) (3 marks): The respiratory system of an elephant is different from that of other mammals. The lungs are attached to the chest cavity wall and diaphragm by collagen fibres.
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