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____ is a neurotransmitter that contributes to arousal and vigilance.

dillosunion

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____ is a neurotransmitter that contributes to arousal and vigilance.

____ is a neurotransmitter that contributes to arousal and vigilance.

a. GABA
b. Serotonin
c. Acetylcholine
d. Norepinephrine

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michaelfotso

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You make an excellent tutor!

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