Multiple Choice
How many classes of human immunoglobulins are there in the immune system?
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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
Describe the specific roles of helper, regulatory, and cytotoxic T cells in normal cellular immunity.