CourseCourseConceptConceptDocumentDocument

IB Biology HL B2.3.8 Hl Pneumocytes in Alveoli Questions

Explore how thin type I pneumocytes minimize diffusion distance while type II pneumocytes secrete surfactant to stabilize alveoli in IB Biology HL B2.3.8.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Interpret alveolar micrographs to link thin type I cells with gas exchange and type II cells with surfactant.
  • Explain how type II surfactant lowers surface tension and prevents alveolar walls from adhering.

IB Biology HL B2.3.8 Hl Pneumocytes in Alveoli Questions question 1

[Maximum number: 2]

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 IB Biology HL B2.3.8 Hl Pneumocytes in Alveoli Questions question 1 — IB Biology HL

Outline the function of pneumocytes in the lungs.

All question bank results loaded