Immune System Which of the following statements is false regarding B cells? B cells synthesize antibodies and put them on their cell surface B cells can undergo class switching and produce a different antibody type B one marrow stem cells migrate to the thymus and develop into B cells B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow B cells synthesize antibodies and put them on their cell surface B cells can undergo class switching and produce a different antibody type B one marrow stem cells migrate to the thymus and develop into B cells 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 The role of the M cell is to induce apoptosis in virus-infected small intestinal epithelia cells trap virus in mucus and prevent entry pass bacteria or virus to underlying macrophages for processing and presentation of antigen they use their cilia to propel mucus out of the small intestine induce apoptosis in virus-infected small intestinal epithelia cells trap virus in mucus and prevent entry pass bacteria or virus to underlying macrophages for processing and presentation of antigen they use their cilia to propel mucus out of the small intestine ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following is correct for CD8 T cells? CD8 T cells only recognize virus-infected cells In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cells can kill individual virus-infected cells in a contact dependent fashion CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells CD8 T cells only recognize virus-infected cells In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only CD8 T cells can kill individual virus-infected cells in a contact dependent fashion CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ANSWER DOWNLOAD EXAMIANS APP
Immune System Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on chromosome 17in man, chromosome 6 in mice chromosome 21 in man, chromosome 6 in mice chromosome 6 in man, chromosone 21 in mice chromosome 6 in man, chromosome 17 in mice chromosome 17in man, chromosome 6 in mice chromosome 21 in man, chromosome 6 in mice chromosome 6 in man, chromosone 21 in mice chromosome 6 in man, chromosome 17 in mice ANSWER DOWNLOAD EXAMIANS APP
Immune System Polymorphonuclear leukocytes (or PMNs) are derived from bone marrow stem cells are a type of phagocyte that can engulf and kill bacteria All of these can be attracted to the site of an infection following activation of complement are derived from bone marrow stem cells are a type of phagocyte that can engulf and kill bacteria All of these can be attracted to the site of an infection following activation of complement ANSWER DOWNLOAD EXAMIANS APP
Immune System Following are the defenses of the colon except fast flow rate sIgA mucus dense resident microbiota fast flow rate sIgA mucus dense resident microbiota ANSWER DOWNLOAD EXAMIANS APP
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