题目内容

Which type of immunoglobulin can cross placenta?

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

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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

Which cell type can secrete antibodies?

A. Pre-B cells
B. Mature T cells
C. Mature B cells
D. Plasma cells

Which of the following are involved in immune synapses in T-cell activation? 1. MHC molecule 2. T cell receptor 3. Costimulatory molecules 4. Adhesion molecules

A. Only 1, 2
B. Only 1, 3
C. Only 1, 2, 3
D. 1, 2, 3, 4