Definition
The Sympathetic Nervous System (SNS) is a branch of the autonomic nervous system along with the enteric nervous system and parasympathetic nervous system.

In your own words...


  • fight or flight
  • in a stressful situation, your body reacts by increasing heart rate, blood pressure, and breathing.
  • The Sympathetic Division sends messages to the internal organs and glands in emergency situations. Some examples include: release of adrenaline, increased heart rate, dilated eye pupils, sweaty palms

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Example from AP Psychology Class: "An example of your sympathetic division can be you running from a dog, that pumps your heart rate fast, and has to circulate more blood faster."