When the body recognizes a relatively harmless substance as a dangerous antigen and mounts an immune response, this response is called
A) passive immunity.
B) active immunity.
C) pathogenesis.
D) an allergic reaction.

Question

Quizplus · Accepted Answer

An allergic reaction occurs when the body's immune system overreacts to a substance it perceives as harmful, even though it is usually harmless to most people. This overreaction can cause symptoms ranging from mild to severe.

When the Body Recognizes a Relatively Harmless Substance as a Dangerous