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IB Biology SL 3.1.15 Ventilation and gas exchange Question Bank

Practise IB Biology SL 3.1.15 by explaining how pH and exercise change ventilation rate.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how low blood pH affects breathing rate.
  • Interpret ventilation data for changing pH, carbon dioxide and exercise.

C3.1.15—Ventilation rate feedback control question 1

[Maximum number: 3]

The fMRI scan shows a human brain.

Figure for Question C3.1.15—Ventilation rate feedback control question 1 — IB Biology SL

Explain control of breathing rate by the structure labelled X .

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