IB Biology SL C3.2.6 Lymphocytes Questions

Explore how helper T-cells and B-cells coordinate antigen-specific defence, plasma-cell antibody secretion and memory-cell formation in IB Biology SL C3.2.6.

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Explain that antigen-specific lymphocytes coordinate adaptive defence: helper T-cells activate selected B-cells, which form plasma cells that secrete antibodies, while T-cells can activate or destroy infected cells.
Explain clonal expansion by mitosis and the formation of memory B- or T-cells, which persist after the primary response and enable faster secondary immunity.

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Study C3.2.6—Lymphocytes conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Outline the role of lymphocytes in defence against disease.

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a	produce antibodies;
b	memory cells confer immunity;
c	specific immunity results from production of antibodies specific to a particular antigen;
d	recognize pathogens;
e	destroy foreign cells/cancer cells;

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IB Biology SL C3.2.6 Lymphocytes Questions question 1