Blood, the heart, circulation and respiration

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Question 3
Easy

An investigation was carried out to measure the breathing rate of a student before, during, and after a period of exercise. The results are shown in Table 1.

Table 1

Time in minutesBreathing rate in breaths per minute
014
314
622
930
1230
1516

A line graph plotted from the data in Table 1. The x-axis is labelled 'Time in minutes' and ranges from 0 to 15. The y-axis is labelled 'Breathing rate in breaths per minute' and ranges from 10 to 35. The trend shows a flat line at 14 breaths per minute between 0 and 3 minutes, a linear increase from 14 to 30 breaths per minute between 3 and 9 minutes, a plateau at 30 breaths per minute between 9 and 12 minutes, and a sharp decrease to 16 breaths per minute by 15 minutes.

Explain the trend shown in Table 1 from 3 minutes to 9 minutes.

[2]

Blood, the heart, circulation and respiration Questions

  1. GCSE
  2. /Biology
  3. /Blood, the heart, circulation and respiration