Edexcel A-Level Biology A2 6p 9 Apparatus Materials and Safe Technique Questions

State the hazard and resulting harm separately, then choose a control tailored to exposure, infection, toxicity, sound intensity or animal welfare.

Exam points

Identify a specific practical hazard and state the biological or physical harm.
Match infection, chemical, apparatus or animal-welfare risks to suitable controls.

[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 6p 9 Apparatus Materials and Safe Technique Questions question 1 — Edexcel A-Level Biology A2

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

Suggest one risk the volunteer subjects might encounter when using this spirometer and how the student could reduce the risk. Risk How the student could reduce the risk.

- suitable risk identified (1)

Mark first risk identified

e.g. risk of infection / carbon dioxide not absorbed/ $\mathrm{CO}_{2}$ poisoning / breathing difficulties /named condition / \{soda lime / carbon dioxide absorber\} is irritant

e.g. sterilise or replace mouthpiece (after each use) / replace carbon dioxide absorber / medical questionnaire / do not take part if at risk / wear gloves / goggles Ignore clean unqualified

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Edexcel A-Level Biology A2 6p 9 Apparatus Materials and Safe Technique Questions question 1