If a B Cell Has Been Activated by Antigen in the Mucosa

question 15

Multiple Choice

If a B cell has been activated by antigen in the mucosa of the respiratory tract,then _____.(Select all that apply.)

• A)lactating mothers will provide antigen-specific natural IgA in breast milk
• B)secretory IgA will be synthesized in the lamina propria of all mucosae
• C)it does not enter the bloodstream but instead remains in the mucosa and differentiates into an effector B cell
• D)it will recirculate through all mucosal tissues,including respiratory and gastrointestinal mucosae
• E)monomeric IgA is secreted into the lamina propria.

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