CAIE IGCSE Biology 11.1.10 Exercise, CO₂ & Breathing Control
Practise explaining how increased blood carbon dioxide during activity raises breathing rate and depth.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- link greater muscle respiration during activity to an increased carbon-dioxide concentration in blood
- state that the brain detects the elevated carbon dioxide
- trace increased nerve impulses to breathing muscles, producing faster and deeper ventilation
11.1.10—Link between physical activity question 1
A student measured the rate and depth of breathing of an athlete for 30 seconds at rest. The data are shown in Fig. 3.2.
Fig. 3.2
Explain the effect of exercise on the rate and depth of breathing shown in Fig. 3.2 and Fig. 3.3.
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