Mark the following statements as true or false. If a statement is false, correct is to make a true statement.

d. Vaccinations are given to induce the production of the inflammatory response.

Explain how active immunity and passive immunity differ.

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

Class I MHC molecules display_____antigens and activate_____cells. Class II MHC molecules display _____antigens and activate_____cells.

Which of the following is not a role of T_H cells?

a. Stimulation of macrophages

b. Activation of naïve T_C cells

c. Stimulation of naïve B cells

d. Stimulation of clonal selection

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The cells involved in organ and transplant rejection are primarily B cells.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The immune response to a viral infection involves NK cells and different kinds of lymphocytes.

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 T_H and T_C cells.

Type I hypersensitivity is due to release of inflammatory mediators from_____, and type IV hypersensitivity is due to the actions of_____.

a. T_H cells; macrophages

b. neutrophils; T_H cells

c. B cells; T_C cells

d. mast cells; T_H cells

Explain why a patient with AIDS due to HIV is at an increased risk of infection and of developing certain cancers.

Which 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