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C3.2.2—Skin and mucous membranes

Skin and mucous membranes explains how a specific barrier, pathogen interaction, immune mechanism or treatment response contributes to protection against infectious disease.

Syllabus
First assessment 2025
Objective
C3.2.2
Level
SL

Concept essentials

  • Skin and mucous membranes has to be linked to the exact pathogen, cell, molecule or population process involved.
  • The biological effect of skin and mucous membranes depends on the sequence from trigger to protective outcome.
  • Clear distinctions within skin and mucous membranes prevent confusion with neighbouring immune responses.
  • Evidence for skin and mucous membranes is strongest when mechanism and consequence are explained together.
ConceptIB Biology SL