![]() Functions that are not essential for survival are shut down. With sympathetic nervous responses, the body speeds up, tenses up and becomes more alert. ![]() It controls the body's "fight or flight" responses, or how the body reacts to perceived danger. The sympathetic nervous system, also part of the autonomic nervous system, originates in the spinal cord specifically in the thoracic and lumbar regions. The parasympathetic nervous system controls the "rest and digest" functions of the body. It originates in the spinal cord and the medulla and controls homeostasis, or the maintenance of the body's systems. The parasympathetic nervous system is part of the autonomic nervous system. What is the parasympathetic nervous system? The parasympathetic and sympathetic nervous systems, along with the enteric nervous system make up the ANS. which is why we are seldom conscious of it. the beating of the heart, expansion or contraction of blood vessels or pupils, etc. The functions of the ANS are involuntary and reflexive, e.g. The ANS is part of the peripheral nervous system and also has control over some muscles within the body. functions of the internal organs such as the heart, stomach and intestines. The autonomic nervous system (ANS) regulates visceral functions, i.e. Neurons are mostly adrenergic: epinephrine / norepinephrine (acetylcholine) Increases converts glycogen to glucose for muscle energy Increases stomach movement and secretionsĭecreases stomach movement and secretions ![]() Functions not critical to survival shut down. Thoracic and lumbar regions of spinal cordĬounterbalance restores body to state of calm.īody speeds up, tenses up, becomes more alert. Sacral region of spinal cord, medulla, cranial nerves 3, 7, 9, and 10 Its general action is to mobilize the body's fight-or-flight response.Ĭontrol the body's response while at rest.Ĭontrol the body's response during perceived threat. The sympathetic nervous system (SNS) is one of 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 parasympathetic nervous system is one of the two main divisions of the autonomic nervous system (ANS). Comparison chart Parasympathetic nervous system versus Sympathetic nervous system comparison chart ![]()
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