Adaptive Immunity as a section of Immunology. Human immune recognition, defense, and immune memory. Clinical treatment and medical history remain in Medicine.
Test your knowledge with these top questions!
Which antibody class appears first in the blood during a new infection?
A single IgM molecule is five antibodies joined together, giving it ten binding sites to clump germs.
Ready-made antibodies given as antivenom provide which kind of immunity?
Borrowed antibodies break down within weeks, while a vaccine teaches the body to keep making its own.
Antibodies are also known by which scientific name?
The Ig in labels like IgG and IgM is short for immunoglobulin, the clinical name for antibodies.
Which antibody class triggers the histamine release behind hay fever allergies?
IgE normally helps fight parasitic worms, so hay fever is a case of mistaken identity.
What do memory cells from clonal selection do when the same germ returns?
Second responses can start in days because memory cells skip the slow first-training step.
Which B cells launch a faster attack when a past germ returns?
Memory B cells survive for years and quickly become antibody-making plasma cells when a familiar germ returns.
Which immune cells directly kill virus-infected body cells?
Killer T cells punch holes in infected cells and order them to self-destruct, stopping viruses from multiplying.
What does a vaccine booster shot mainly do months after the first doses?
Antibody levels fall over time, but boosters reawaken memory cells to make fresh antibodies quickly.
Which immune cells linger after infection to recognize the same germ later?
Memory B and T cells can survive for years and trigger a faster, stronger response on reexposure.
Which immune cells multiply rapidly after clonal selection recognizes a germ?
B cells release antibodies while T cells kill infected cells or direct the attack.