Ain't never felt this way. Can't get enough so stay with me. It's not like we got big plans. Let's drive around town holding hands. And you need to know. You're the only one, alright alright. And you need to know. That you keep me up all night, all night.
Definition of SYMPATHETIC NERVOUS SYSTEM. : the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate â compare parasympathetic nervous system.See sympathetic nervous system defined for kids.ADVERTISEMENT.efinition of SYMPATHETIC NERVOUS SYSTEM. : the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate â compare parasympathetic nervous system. See sympathetic nervous system defined for kids. ADVERTISEMENT.
The sympathetic nervous system, also part of the autonomic nervous system, originates in the spinal cord; specifically in the thoracic and lumbar regions. It controls the body's fight or flight responses, or how the body reacts to perceived danger.he parasympathetic nervous system (PNS) controls homeostasis and the body at rest and is responsible for the body's rest and digest function. The sympathetic nervous system (SNS) controls the body's responses to a perceived threat and is responsible for the fight or flight response.