Biology 5090 · 9 Human gas exchange
9.1 Human gas exchange
Describe the human gas exchange system, breathing mechanisms, air composition, and protective roles of mucus and cilia.
- Questions
- 175
- Years
- 2004–2026
- Multiple choice
- 129
- Written answer
- 46
- Average marks
- 3.2
Practise human gas exchange questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 01, 11, 12129
- Paper 2variants 02, 21, 2235
- Paper 3variants 03, 31, 326
- Paper 6variants 61, 624
- Paper 4variants 421
Questions by year
| Year | May/June | Oct/Nov | Total |
|---|---|---|---|
| 2026 | 3 | – | 3 |
| 2023 | 1 | 4 | 5 |
| 2022 | 5 | 2 | 7 |
| 2021 | 5 | 5 | 10 |
| 2020 | 5 | 4 | 9 |
| 2019 | 6 | 5 | 11 |
| 2018 | 4 | 4 | 8 |
| 2017 | 8 | 6 | 14 |
| 2016 | 9 | 4 | 13 |
| 2015 | 5 | 8 | 13 |
| 2014 | 1 | 5 | 6 |
| 2013 | 11 | 5 | 16 |
| 2012 | 6 | – | 6 |
| 2011 | 5 | 1 | 6 |
| 2010 | – | 2 | 2 |
| 2009 | 2 | 4 | 6 |
| 2008 | 4 | 4 | 8 |
| 2007 | 3 | 8 | 11 |
| 2006 | 3 | 3 | 6 |
| 2005 | 2 | 5 | 7 |
| 2004 | 5 | 3 | 8 |
