Examlex
Substances that are recognized as foreign and provoke immune responses are called _________.
Viruses
Infectious agents that replicate only inside the living cells of other organisms, causing various diseases.
White Blood Cells
Immune system cells that defend the body against infectious diseases and foreign substances.
Histamine
A compound found in the body as a part of the immune response that causes dilation of capillaries, contraction of smooth muscle, and stimulation of gastric acid secretion, involved in allergic reactions.
Heparin
A medication used as an anticoagulant to prevent and treat blood clots.
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