Divisions of The Nervous System

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• Divisions of The Nervous System

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Divisions of Nervous System
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• Antagonistic
• Opposing actions to maintain homeostasis

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Neurotransmitters

• Sympathetic
• Noradrenaline (aka norepinephrine)
• Ex) Released by sympathetic neuron to increase HR
• Monoamine oxidase enzyme destroys noradrenaline
• Parasympathetic
• Acetylcholine (ACh)
• Ex) Released by parasympathetic neuron to
  decrease HR
• Acetylcholinesterase enzyme destroys ACh

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