The sympathetic division mobilizes the body during extreme situations (such as fear, exercise, or rage), whereas the parasympathetic division allows us to "unwind" and conserve energy.
Sympathetic Nervous System:If you think of it as "fight or flight" it becomes a lot easier to remember how it works. It increases the heart rate, increases energy production, decreases the GI system...
The Sympathetic nervous system can increase heart-rate and constricts blood vessels. The Parasympathetic nervous has the opposite effect on the same organs.Sympathetic= fight or...