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IB Biology HL C3.2.4 Innate Vs Adaptive Immune System Questions

Explore how non-specific innate responses contrast with antigen-specific adaptive lymphocyte and antibody responses, including evidence for acquired memory in IB Biology HL C3.2.4.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Distinguish innate immunity as a broad, rapid defence present from birth that does not become more specific, from adaptive immunity as an acquired response targeted to particular antigens or pathogens.
  • Use immune-response evidence to identify adaptive specificity and memory in lymphocyte or antibody responses, contrasted with non-specific phagocyte and barrier defences.

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Study C3.2.4—Innate vs. adaptive immune system conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C3.2.4 Innate Vs Adaptive Immune System Questions question 1

[Maximum number: 1]

Adaptive immunity leads to cells that are infected by viruses being killed, resulting in immune memory which is the basis of vaccination.

Distinguish between innate and adaptive immune response.

The graph shows the magnitude of the immune response after infection or after vaccination over time.

Figure for Question IB Biology HL C3.2.4 Innate Vs Adaptive Immune System Questions question 1 — IB Biology HL
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