IB Biology HL 3.1.6 Lung Volume Measurements Question Bank

Practise IB Biology HL 3.1.6 through exact HL questions on spirometry calculations, lung capacity, ventilation responses and athletic physiology.

Exam points

Analyse spirometry data to calculate lung volumes, ventilation rates and minute ventilation.
Compare tidal volume and ventilation-rate responses across exercise intensity or athletic training.
Evaluate lung-capacity measurements by linking trace features to physiological performance.

[Maximum number: 1]

Measurements of the lung capacity of a student were recorded using a spirometer and displayed with a data logger. Initially the student was at rest, then changed to carrying out strenuous exercise. The results are displayed in the graph.

Figure for Question B3.1.6—Lung volume measurements question 1 — IB Biology HL

Calculate the ventilation rate at rest, giving the units.

12 breaths per minute/ 6 litres per minute

Marking guidance:

Accept answers from 11 to 12 breaths per minute.

Accept answers from 5.5 to 6 litres per minute.

Answer must include breaths or litres and a standard unit of time.

Correct: eg: 12 breaths / minute eg: $0.1 L \sec ^{-1}$ or $6 L \min ^{-1}$ Incorrect: eg: but 12 breaths = 0 marks

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B3.1.6—Lung volume measurements question 1