题目内容

CD19 is expressed on what cells?

A. B-1 cells
B-2 cells
C. T cells
D. Regulatory B cells

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Which of the following cytokine is releases from virus-infected cells soon after infection?

A. TGF-β
B. IL-10
C. IFN-α
D. IL-2

Which type of immunoglobulin can cross placenta?

A. IgD
B. IgE
C. IgG
D. IgM

At secondary immune responses, which kind of immunoglobulin has the highest concentration in serum?

A. IgD
B. IgE
C. IgG
D. IgM

Which type of antigens have immunologic memory and isotype switching?

A. TI-1 antigens
B. TI-2 antigens
C. TI antigens
D. TD antigens