DP Biology (last assessment 2024)

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Question 18M.3.SL.TZ2.a

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.SL.TZ2.a
Level SL Paper 3 Time zone TZ2
Command term Determine Question number a Adapted from N/A
a.
[Maximum mark: 2]
18M.3.SL.TZ2.a

In an experiment to explore the effect of exercise on ventilation rate, a subject breathed into a data logging sensor that measured air flow.

The graphs show the result before the subject exercised and immediately after the exercise had finished.

Determine the ventilation rate after exercise.

 

[2]

Markscheme

a. four breaths in 10 s = 4 × 6 «breaths min–1»
OR
six breaths in 15 s = 6 × 4 «breaths min–1» 

b. 24 «breaths min–1» 

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