'Which Neurotransmitter, That Is Often Called The ''Happiness Hormone'', Is Primarily Found In The Enteric Nervous System In The Gastrointestinal Tract And Is Thought To Have A Positive Influence On Mood And Emotion?'

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1. 'Which Neurotransmitter, That Is Often Called The ''Happiness Hormone'', Is Primarily Found In The Enteric Nervous System In The Gastrointestinal Tract And Is Thought To Have A Positive Influence On Mood And Emotion?'