21. The Immune System
Classes of Antibodies
Multiple Choice
Multiple Choice______ is the first immunoglobulin class produced during a primary response.
A
IgA.
B
IgE.
C
IgM.
D
IgG.
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______ is the first immunoglobulin class produced during a primary response.
IgA.
IgE.
IgM.
IgG.