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The first defense is nonspecific.

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9y ago
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12y ago

Immune System

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Q: What is the first defense to react when your body is attacked by a foreign substance?
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If foreign substances pass the body's first line of defense and into the bloodstream.what happens?

They are attacked by lymphocytes.


What happens if foreign substances pass the body's first line of defense and go into the bloodstream?

They are attacked by lymphocytes .


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If foreign substances pass the body's first line of defenses and into the bloodstream what happens?

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When the body is attacked by a foreign substance the defenses are the first to react?

The extracellular spaces are protected by the humoral immune response, in which antibodies produced by B cells cause the destruction of extracellular microorganisms and prevent the spread of intracellular infections. This is often called antibody mediated immunity. This response is triggered by an antigen and usually requires helper T cells.