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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
Good timing, thanks!
smi3
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Yesterday
This helped my grade so much Perfect
paulinaibarra98
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2 hours ago
Helped a lot
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