The antigen-antibody reaction is an example of what type of immunity?
a. Humoral
b. Cellular
c. Innate
d. Passive
ANS: A
Humoral immunity is a defense system that involves antibodies and white blood cells that are produced to fight antigens. Cellular immunity involves defense by white blood cells against any microorganisms that the body does not recognize as its own. The innate (nonspecific) immune system provides immediate defense against foreign antigens. Passive immunity occurs when a person receives an antibody produced in another body.
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