Autonomic Nervous System: Sympathetic vs Parasympathetic, Animation

The divisions of the ANS: Sympathetic, SNS, versus parasympathetic, PSNS. This video is available for instant download licensing here …


  1. Amazing explanation. Liked. However one small confusion.

    As you say there are only 2 neurons (pre and post ganglionic) in between the CNS and the Effector organs, how it's possible for just two microscopic neurons to cover that distance? Please elaborate.

  2. What is difference between involuntarily reflexes and involuntarily sympathetic action? For example how you determine that increas of heart beat is sympathetic but increase of secretion of salivia when seeing food us a reflex?

  3. If the sympathetic nervous system comes into play during fight or flight situations why does it have shorter myelinated axons and longer post ganglionic unmyelinated axon? Since we already know that myelinated axons transmit impulses much faster shouldnt it be the other way around?

  4. Omg where were u when I was in clg I just did spoon feeding in order to clear the exam … But didn't understand this process clearly today I got all this

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