BackType I hypersensitivity is due to release of inflammatory mediators from_____, and type IV hypersensitivity is due to the actions of_____.
a. TH cells; macrophages
b. neutrophils; TH cells
c. B cells; TC cells
d. mast cells; TH cells
Lymphocytes that develop immunocompetence in the bone marrow are:
a. T lymphocytes
b. B lymphocytes
c. NK cells
d. B and T lymphocytes
Mark the following statements as true or false. If a statement is false, correct is to make a true statement.
In the primary immune response, the lag phase lasts about 5 days, during which time B cells proliferate and differentiate.
Epitopes are:
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Cancer cells are destroyed by NK cells, TC cells, and macrophages.
Give a function for each of the following:
(a) Cytotoxic T cells
(b) Helper T cells
(c) Regulatory T cells
(d) Plasma cells
(e) NK cells
Define immunocompetence and self-tolerance. How is self-tolerance achieved?
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.
Many 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?
Give a function for each of the following:
(f) Stromal cells
(g) Epithelial reticular cells
(h) Interferons
(i) Pyrogens
(j) T cells
(k) B cells