Edexcel A-Level Biology A2 7.15 Core Practical 17 Exercise and Spirometer Traces Questions

Read volume and time from labelled points, calculate the gradient or breaths per minute and apply dead-space or tidal-volume values with consistent units.

Exam points

Calculate oxygen consumption rate from the gradient of a spirometer trace.
Calculate alveolar or minute ventilation from tidal volume and breathing rate.

[Maximum number: 2]

The diagram shows a spirometer that can be used to investigate human lung function.

Figure for Question Edexcel A-Level Biology A2 7.15 Core Practical 17 Exercise and Spirometer Traces Questions question 1 — Edexcel A-Level Biology A2

A student used a spirometer to investigate the consumption of oxygen of a group of volunteers.

The graph shows a spirometer trace from one volunteer breathing at rest.

The line PQ indicates the oxygen consumption. Volume of air / dm ^3 Calculate the rate of oxygen consumption between P and Q. Give your answer with appropriate units.

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Edexcel A-Level Biology A2 7.15 Core Practical 17 Exercise and Spirometer Traces Questions question 1