BackWhich of the following conditions may lead to the development of autoimmunity?
a. Self antigens not previously encountered by T cells are released into the circulation
b. Foreign antigens mimic self antigens
c. Cells may inappropriately display class II MHC molecules
d. Certain pathogens nonspecifically activate B cells
e. All of the above are correct
Where do T cells undergo central tolerance selection?
What is immunological tolerance?
Explain why a patient with AIDS due to HIV is at an increased risk of infection and of developing certain cancers.
Mark the following statements as true or false. If a statement is false, correct is to make a true statement.
The secondary immune response is mediated by plasma cells.
Mr. White developed neutropenia as a consequence of cancer chemotherapy, which destroyed much of his bone marrow. What other components of the immune system would be harmed by bone marrow destruction? Would you expect his hematocrit to be elevated or decreased? What effects would you expect to see from this change in hematocrit?