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CAIE A-Level Biology 8.2.5 Oxygen Loading and Partial Pressure

Practise linking alveolar and tissue pO₂ to haemoglobin loading or unloading, reading curve values and using the steep region to explain efficient tissue oxygen delivery.

Syllabus
2028–2030
Course
Biology 9700
Level
AS

Exam points

  • link high alveolar pO₂ with diffusion into blood and high haemoglobin saturation
  • link lower tissue pO₂ with oxyhaemoglobin dissociation and oxygen diffusion to cells
  • use the curve’s steep region to explain substantial unloading across tissue pO₂ values

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