Immune System
Which of the following(s) is/are the determinants of antigenicity?

Foreignness
Chemical nature
Size of the antigen
All of these

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

ANSWER DOWNLOAD EXAMIANS APP

Immune System
Which of the following statements is false regarding B cells?

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 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
Which of the following is correct for isoantigens?

They are antigens found in all members of different species
They are antigens found in some members of a species
They are antigens found in some members of different species
They are antigens found in all members of a species

ANSWER DOWNLOAD EXAMIANS APP