Which cells are important in maintaining intestinal immune homeostasis? (Select all that apply)

Which effects can result from histamine binding to H1 receptors? (Select all that apply)

Which treatment should be administered immediately during systemic anaphylaxis?

Name the six general effector functions mediated by antibodies (acronyms are acceptable) 

Which structures contribute directly to the intestinal barrier against microbes? (Select all that apply)

Which mechanisms are used by cytotoxic T lymphocytes (CTLs) to induce target-cell death? (Select all that apply)

Which mediators are released or generated during Type I hypersensitivity reactions? (Select all that apply)

NKT cells possess an invariant T-cell receptor that recognizes glycolipids presented by CD1d.

Which outcomes may occur to a germinal center B cell after somatic hypermutation? (Select all that apply)

Which antibody isotype is produced first during a primary immune response?