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.

Exam points

Distinguish innate from adaptive immunity: innate responses are broad and non-specific, while adaptive responses target particular antigens and produce memory cells.

[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

Criterion	Innate Immunity	Adaptive immunity
a	responds to a broad category/range of pathogens / non-specific	responds in a specific way to particular pathogens/targets individual pathogens / specific;
b	no immunological memory OR responses do not change during an organism’s life OR different pathogens are all responded in the same way	builds up immunological memory OR immune responses develop during an organism’s life OR each pathogen elicits a new and different response;
c	born with	acquired;

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