During the Secondary Response to Antigens Following a Previous Initial

question 70

Multiple Choice

During the secondary response to antigens following a previous initial exposure,

• A) IgM molecules first appear in the bloodstream, followed by a slow rise in IgG.
• B) an immediate rise in IgG concentrations occurs.
• C) the antigen must first activate the appropriate B cells.
• D) the antibody levels do not peak until one to two weeks after antigen exposure.
• E) memory B cells do not differentiate into plasma cells.

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