21. The Immune System

Compare and contrast the effects of complement with those of interferon.

Give one example of each type of immunity: innate immunity, naturally acquired active immunity, artificially acquired active immunity, artificially acquired passive immunity, and naturally acquired passive immunity.

The primary B-cell receptor is:

Name the five antibody classes and describe where each is most likely to be found in the body.

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.

_______ is the immunoglobulin class that neutralizes viruses in the intestinal tract.

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

More than one choice may apply.

Which of the following antibody capabilities causes a transfusion reaction with A or B erythrocyte antigens?

a. Neutralization

b. Precipitation

c. Complement fixation

d. Agglutination

Which of the following is NOT an immunoglobin class?

The specificity of an antibody is determined by the

(a) Fixed segment

(b) Antigenic determinants

(c) Variable region

(d) Size of the antibody

(e) Antibody class

Cells that can directly attack target cells include all of the following except:

a. Macrophages

b. Cytotoxic T cells

c. Helper T cells

d. Natural killer cells