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Home Q & A Board Science-Related Homework Help Psychology
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mcranfield mcranfield
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6 years ago
Insulin is
 
  A) a neurotransmitter.
  B) a metabolic hormone.
  C) an endogenous opioid.
  D) an exogenous opioid.
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tdclarktdclark
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6 years ago
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mcranfield Author
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6 years ago
Good timing, thanks!
kamikazekota
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Yesterday
Just got PERFECT on my quiz
lubennick
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2 hours ago
Helped a lot
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