ConceptConceptDocsDocuments

CAIE IGCSE Biology 11.1.5 Investigating Exercise & Breathing

Practise measuring and describing how physical activity changes breathing rate and depth using graphs and timed data.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • measure breathing rate over a fixed interval before and after a standardised period of exercise
  • calculate breaths per minute or volume per breath from a breathing trace or table
  • describe changes in both rate and depth with comparative values and recovery over time

11.1.5—Effects of physical activity on question 1

[Maximum number: 2]

Question (a)

(a)

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

Fig. 3.2

[ 2 ]

Question (i)

(i)

Using the information in Fig. 3.2, calculate the rate of breathing at rest. breaths per minute

The measurements were repeated while the athlete was running on a treadmill.
The data are shown in Fig. 3.3.

Fig. 3.3

Fig. 3.3

[ 1 ]

Question (ii)

(ii)

Using the information in Fig. 3.3, calculate the volume of air inspired in one breath from 25 seconds. dm3\mathrm{dm}^{3}

[ 1 ]
All question bank results loaded