Explain how the counter-current flow in fish gills makes gas exchange efficient.
From Mock A · Paper 1 (topics 1–4)
5.22 marks
A person has a tidal volume of 0.5 dm³ and a breathing rate of 14 breaths per minute. Calculate their pulmonary ventilation, giving units.
From Mock A · Paper 1 (topics 1–4)
5.32 marks
Explain how insects limit water loss while still exchanging gases efficiently.
From Mock B · Paper 1 (topics 1–4)
13.13 marks
Explain how the structure of the alveoli is adapted for efficient gas exchange.
From Mock B · Paper 1 (topics 1–4)
13.23 marks
A person with emphysema has a forced expiratory volume in 1 second (FEV₁) of 1.6 dm³ compared with a healthy value of 3.8 dm³ (data are illustrative, written for this paper). Calculate the percentage reduction and explain why it occurs.
From Mock C · Paper 1 (topics 1–4)
9.13 marks
Explain how xerophytic plants reduce water loss.
From Mock C · Paper 1 (topics 1–4)
9.22 marks
Explain how air moves into the lungs during inspiration.
Score 0 / 18 · 0 of 7 marked
This paper is written by Plasmo in the style of the AQA A-Level Biology exam. It is not a past paper and is not produced or endorsed by the exam board.
Gas exchange Exam Questions: AQA A-Level Biology | Plasmo