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kitty kitty
wrote...
Posts: 590
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6 years ago
Caffeine produces alertness by
 
  a. increasing the release of adenosine.
 b. blocking receptors for adenosine.
 c. stimulating nicotinic acetylcholine (ACh) receptors.
 d. blocking receptors for serotonin.
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wrote...
6 years ago
b
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