BackMany phagocytic immune cells such as macrophages and dendritic cells commonly engulf foreign or dangerous materials in the body. If these cells engulf antigens, the cells will present the antigens on their surface. Which immune cells will respond to these “presented” antigens and trigger an immune response if necessary?
Define immunocompetence and self-tolerance. How is self-tolerance achieved?
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?
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.
Blocking the antigen receptors on the surface of lymphocytes would interfere with
(a) Phagocytosis of the antigen
(b) That lymphocyte's ability to produce antibodies
(c) Antigen recognition
(d) The ability of the lymphocyte to present antigen
(e) Opsonization of the antigen
Differentiate between humoral and cellular adaptive immunity.
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Dendritic cells may activate both TH and TC cells.
On which type(s) of cells are class I MHC molecules located?
a. Antigen-presenting cells only
b. B cells only
c. All nucleated body cells
d. Antigen-presenting cells and B cells