what is the difference between parasympathetic and sympathetic?
 The parasympathetic nervous system is one of the two main divisions of the autonomic nervous system (ANS). Its general function is to control homeostasis and the body's rest-and-digest response. The sympathetic nervous system (SNS) is one of two main divisions of the autonomic nervous system (ANS).Its general action is to mobilize the body's fight-or-flight response. 