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IB Biology HL B3.1.4 Mammalian Lung Adaptations Questions

Explore how many small alveoli, thin squamous walls, capillary beds and surfactant maintain efficient mammalian gas exchange in IB Biology HL B3.1.4.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Relate many small alveoli, thin squamous walls and dense capillary beds to a large area and short diffusion path for gas exchange.
  • Explain how ventilation and surfactant maintain open, moist alveoli and support efficient diffusion.

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Study B3.1.4—Mammalian lung adaptations conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL B3.1.4 Mammalian Lung Adaptations Questions question 1

[Maximum number: 6]

A supply of oxygen is needed for aerobic respiration in mitochondria. Describe the features of alveoli in human lungs that adapt them for efficient absorption of oxygen.

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