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riza riza
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11 years ago
A. acetylcholine.

B. creatine kinase.

C. creatinine.

D. lactic acid.
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michimichi
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11 years ago
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11 years ago
The question is a bit unclear.  Acetycholine is the neurotransmitter at the neuromuscular junction, so it is responsible for straited muscle contraction.

However, what initiates events is a much more complex question.  That is, what are the neurotransmitters that make one reach for a beer when an ad is seen on TV?
This involves a long chain of neurological events that involves many neurotransmitters, some inhibitory and some excitatory.

In any event, the other three answers are not neurotransmitters, so A is the best one by elimination.
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