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
Immune System The role of the M cell is to induce apoptosis in virus-infected small intestinal epithelia cells they use their cilia to propel mucus out of the small intestine pass bacteria or virus to underlying macrophages for processing and presentation of antigen trap virus in mucus and prevent entry induce apoptosis in virus-infected small intestinal epithelia cells they use their cilia to propel mucus out of the small intestine 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 Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? By rearrangements of the DNA encoding the variable regions of the heavy and light chains By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) Antibody proteins can physically change their shape to bind different epitopes By rearrangements of the DNA encoding the variable regions of the heavy and light chains By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) Antibody proteins can physically change their shape to bind different epitopes ANSWER DOWNLOAD EXAMIANS APP
Immune System Which of the following is correct for CD8 T 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 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 ANSWER DOWNLOAD EXAMIANS APP
Immune System Which is not an antigen-presenting cell (or APC)? Dendritic cell B cell All of these Polymorphonuclear leukocyte (or PMN) Dendritic cell B cell All of these Polymorphonuclear leukocyte (or PMN) ANSWER DOWNLOAD EXAMIANS APP
Immune System T cell receptors (or TCR) on CD4+ T cells recognize peptides associated with MHC class I molecules are secreted out into the environment to bind antigens recognize peptides associated with MHC class II molecules recognize peptides not associated with MHC molecules recognize peptides associated with MHC class I molecules are secreted out into the environment to bind antigens recognize peptides associated with MHC class II molecules recognize peptides not associated with MHC molecules ANSWER DOWNLOAD EXAMIANS APP
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