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Home Q & A Board Biology-Related Homework Help Medicine Pharmacology (Moderator: DelightfulMind)
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RetroKoH RetroKoH
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6 years ago
The actual sites of gas exchange within the lungs are the
 A) bronchioles.
  B) alveolar ducts.
  C) terminal sacs.
  D) alveoli.


Which immunoglobulin does the body produce first in response to an antigen?
 A) IgA
  B) IgM
  C) IgG
  D) IgE
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andrea63857andrea63857
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6 years ago
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RetroKoH Author
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6 years ago
Thank you, thank you, thank you!
my life
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Yesterday
this is exactly what I needed
SUmmerPeople
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2 hours ago
Smart ... Thanks!
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