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KENHUYNH96 KENHUYNH96
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6 years ago
The first defense within the nose, mouth, throat, and lungs against infectious microbes is
 
  a. the immunoglobulin IgA.
  b. CRH.
  c. cortisol.
  d. epinephrine.
  e. the release of antigens.
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IDJIDJ
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6 years ago
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