Immune System Which of the following statements is false regarding B cells? B cells synthesize antibodies and put them on their cell surface 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 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 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 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 Following are the defenses of the colon except dense resident microbiota mucus sIgA fast flow rate dense resident microbiota mucus sIgA fast flow rate 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? Antibody proteins can physically change their shape to bind different epitopes By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) By rearrangements of the DNA encoding the variable regions of the heavy and light chains Antibody proteins can physically change their shape to bind different epitopes By the combination of different heavy and light chains that form the antigen binding site Both (a) and (b) By rearrangements of the DNA encoding the variable regions of the heavy and light chains ANSWER DOWNLOAD EXAMIANS APP
Immune System Which is not an antigen-presenting cell (or APC)? Polymorphonuclear leukocyte (or PMN) Dendritic cell B cell All of these Polymorphonuclear leukocyte (or PMN) Dendritic cell B cell All of these ANSWER DOWNLOAD EXAMIANS APP
Immune System Chemically an antigen may be protein polysaccharide any of these lipid protein polysaccharide any of these lipid ANSWER DOWNLOAD EXAMIANS APP
Immune System Lysozyme is present in sweat saliva Cerebro spinal fluid (CSF) urine sweat saliva Cerebro spinal fluid (CSF) urine ANSWER DOWNLOAD EXAMIANS APP
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