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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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citylites citylites
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8 years ago
An allergen is best described as:
A) a foreign substance that causes a hypersensitivity reaction in the body.
B) a chemical messenger in the body that activates the immune system when there is a foreign material present.
C) a substance in the body that recognizes foreign materials.
D) a chemical released by cells in the body to fight foreign materials.
Textbook 
EMR Complete: A Worktext

EMR Complete: A Worktext


Edition: 1st
Author:
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bsum1bsum1
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8 years ago
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citylites Author
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#2
8 years ago
Easier than I thought, thank you
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#3
8 years ago
You're very welcome
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