First Aid USMLE STEP 1 flashcards Questions and Answers 100% Correct

folliclesite in lymph node of B cell localization and proliferation paracortexsite in lymph node that houses T cells thirdWhat pharyngeal pouch is the thymus derived from? MHC Ipresent endogenously synthesized antigens? MHC IIpresent exogenously synthesized antigens? MHC Iantigen peptides are loaded onto MHC I in RER after delivery via TAP? MHC IIantigen loaded following release of invariant chain in an acidifed endosome? CD8 T cellTcell that directly kills virus infected cells? cortexWhat part of the thymus does positive selection of T cells occur in? medullaWhat part of the thymus does negative selection of T cells occur in? autoimmune polyendocrine syndrome-1Deficiency of autoimmune regulator AIRE in negative selection leads to what syndrome? Th1 cellHelper T cell type that secrets IFN-y? Th2 cellHelper T cell type that secretes IL4, IL5, IL10, and IL13? IL 10 and TGF BThe anti inflammatory cytokines? IgGImmunoglobulin that can cross the placenta?