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Males with a deficiency in the CD40 ligand:

Dimeric IgA is constantly secreted into the gut lumen to keep commensal organisms in check in our gut.

What is not a difference between intestinal macrophages and macrophages of non-mucosal tissue?

Centrocytes will move from the light zone to the dark zone, where they will encounter antigens on the dendrites of FDC’s.

A functional BCR has _____ associated with it while a functional TCR has a(n) _____ complex associated with it for signaling.

The B-cell co-receptor typically binds to the complement degradation product iC3.

Which of the following is made and secreted into the lumen of the gut to keep commensal bacteria in check?

The lag of about a week in the production of Ab’s (other than just IgM’s) by plasma cells is due to:

What is the C3 convertase of the classical pathway of complement?

Centroblasts use the DNA- modifying enzyme activation-induced cytidine deaminase (AID) for what process/es?