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Nicotinic Ach
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receptor
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Acetylcholine
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Nicotine
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Tubocurarine
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a-bungarotoxin
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Beta-adreno-
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receptor
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Noradrenaline
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Isoprenaline
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Histamine (H1-
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receptor
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Histamine (H2
-
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receptor)
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Opiate (µ- )
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receptor)
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5-
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hydroxytryptamine
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Dopamine (D2-
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receptor)
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Dopamine
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Bromocriptine
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Oestrogen
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receptor
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