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CAIE IGCSE Biology 11.1.5 Effects of Physical Activity on Questions

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

CAIE IGCSE Biology 11.1.5 Effects of Physical Activity on Questions 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 ]
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