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1. Sympathetic Nervous System (fight or flight)

   • Location: Thoracic and Lumbar regions of spinal cord
   • Preganglionic fibers are SHORT
     • Releases Acetylcholine (Ach)
   • LONG postganglionic fiber
     • Releases Noradrenaline/Norepinephrine

2. Parasympathetic Nervous System (rest and digest)

   • Location: From cranial and sacral areas of CNS
   • Preganglionic fibers are LONG
     • Releases Acetylcholine (Ach)
   • Postganglionic fiber is VERY SHORT
     • Releases Acetylcholine (Ach)

3. SIMILARITIES

   • Most visceral organs innerverted by both symphathetic and parasympathetic fiber
   • In general, produce opposite effect in a particular organ
   • Dual innervation of organ by both branches of ANS allows precise control over organ's activity

4. LOCATION

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