Which of the following statements is correct about the production of antibodies after stimulation of B cells by antigen?
Multiple Choice
a. Later, under the influence of T-helper cells, IgM-secreting plasma cells may stop producing and secreting IgM in favor of another antibody class, usually IgD.
b. Pentameric IgM serves as the B-cell receptor for antigen, and monomeric IgM is the first type of antibody secreted after B-cell activation.
c. Class switching occurs when a cell secreting IgM changes the constant region of its antibody molecules, producing a different antibody class (IgG, IgA, or IgE).
C is correct answer because class switching occur by changing constant region of antibody so it is right statement.
Which of the following statements is correct about the production of antibodies after stimulation of B...
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How does activation by T-independent antigens differ
from this figure?
Extracellular antigens B cell receptors Antigen fragments MHC class II with antigen displayed on surface **Cytokines Plasma cell Antibodies T cell B cell B cell 1 APC receptors 2 Antigen is 3 Antigen fragments are T helper cell recognize and phagocytized and displayed on the B cell secretes cytokines, attach to antigen. digested (see surface, attracting a activating a B cell. Figure 17.12). matching T helper cell. Figure 17.5 Activation...
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