Why the secondary immune response is faster
Why is the antibody response to a second exposure to the same antigen faster and larger than the first?
Answer A: explanation for every choice
A
Correct. Memory B cells are more numerous and quicker to respond, and many have already class-switched to IgG.
B
Antigen processing doesn't slow on re-exposure.
C
Antibodies are made only by B cells and plasma cells, part of adaptive immunity.
D
Complement has no antigen-specific memory.
TakeawayImmunological memory lives in memory B and T cells.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb150.