Immune System Following are the defenses of the colon except sIgA mucus dense resident microbiota fast flow rate sIgA mucus dense resident microbiota fast flow rate ANSWER DOWNLOAD EXAMIANS APP
Immune System Which is not an antigen-presenting cell (or APC)? Polymorphonuclear leukocyte (or PMN) B cell Dendritic cell All of these Polymorphonuclear leukocyte (or PMN) B cell Dendritic cell All of these ANSWER DOWNLOAD EXAMIANS APP
Immune System The role of the M cell is to they use their cilia to propel mucus out of the small intestine induce apoptosis in virus-infected small intestinal epithelia cells pass bacteria or virus to underlying macrophages for processing and presentation of antigen trap virus in mucus and prevent entry they use their cilia to propel mucus out of the small intestine induce apoptosis in virus-infected small intestinal epithelia cells pass bacteria or virus to underlying macrophages for processing and presentation of antigen trap virus in mucus and prevent entry ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following statements is false regarding B cells? B one marrow stem cells migrate to the thymus and develop into B cells B cells can undergo class switching and produce a different antibody type B cells synthesize antibodies and put them on their cell surface B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow B one marrow stem cells migrate to the thymus and develop into B cells B cells can undergo class switching and produce a different antibody type B cells synthesize antibodies and put them on their cell surface B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow ANSWER DOWNLOAD EXAMIANS APP
Immune System Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is actin interleukin CD8 HLA actin interleukin CD8 HLA ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following is correct for CD8 T cells? In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells CD8 T cells only recognize virus-infected cells CD8 T cells can kill individual virus-infected cells in a contact dependent fashion In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells CD8 T cells only recognize virus-infected cells CD8 T cells can kill individual virus-infected cells in a contact dependent fashion ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS