Difference Between Sympathetic and Parasympathetic Nervous System

Thekey differencebetween sympathetic and parasympathetic nervous system is that the交感神经系统is responsible for controlling the body’s responses to perceived harm and the mobilizing the “fight or flight” response while the parasympathetic nervous system is responsible for controlling thehomeostasisand the body’s “rest-and-digest” response.

Theautonomic nervous systemis a self-controlled system that comes under theperipheral nervous system. Therefore, it basically regulates the internal environment of the body by exchanging commands between the peripheral nervous system and organs in order to maintain important bodily functions. Further, there are two main divisions in the autonomic nervous system. They are; sympathetic nervous system and parasympathetic nervous system. Both systems usually act on the same organ and generate the same action potentials, yet their functions are different and oppose to each other.

内容

1.Overview and Key Difference
2.什么是交感神经系统
3.什么是副交感神经系统
4.Similarities Between Sympathetic and Parasympathetic Nervous System
5.Side by Side Comparison – Sympathetic vs Parasympathetic Nervous System in Tabular Form
6。概括

什么是交感神经系统?

交感神经系统是自主神经系统的两个部分之一。它由一个由短的前轴突组成的神经网络组成，该轴突延伸至位于脊髓的胸腔和腰部区域附近的神经节以及从神经节向目标器官延伸的长长后神经元神经元组成。因此，交感神经传出神经元的纤维也称为胸骨流出。

交感神经系统的主要功能是为身体准备紧急情况准备并产生快速动员以避免危险。简而言之，交感神经系统控制着威胁情况下人体的“战斗或飞行”反应。

什么是副交感神经系统?

副交感神经nervous system comprises of preganglionic axons that are organ-associated ganglions in the cranial and sacral regions of the spinal cord, and of short postganglionic neurons extending from ganglia to target organs. Thus, the fibres of parasympathetic efferent neurons also refer to as craniosacral outflow.

Moreover, Acetylcholine is the neurotransmitter at the terminal synapses in this nervous system. This system is responsible for maintaining the activities such as “rest- and – digest” or “feed- and- breed” that occurs when the body is at rest.

What are the Similarities Between Sympathetic and Parasympathetic Nervous System?

• 同情and Parasympathetic Nervous System is parts of the autonomic nervous system.
• Also, bothy belong to the peripheral nervous system.
• 而且，他们负责身体的非自愿反应。

What is the Difference Between Sympathetic and Parasympathetic Nervous System?

同情and Parasympathetic Nervous System are two main parts of the autonomic nervous system. The difference between sympathetic and parasympathetic nervous system is that the sympathetic nervous system functions to mobilize the body’s fight-or-flight response while parasympathetic nervous system functions to control the homeostasis of the body.

The following infographic indicates more facts regarding the difference between sympathetic and parasympathetic nervous system.

概括– Sympathetic vs Parasympathetic Nervous System

The autonomic nervous system comprises two main nervous systems that are sympathetic nervous system and parasympathetic nervous system. This system controls the functions of organs as well as controls some muscles. The sympathetic nervous system controls the body when there is a threat. In simple words, it controls the body’s “fight or flight” responses. On the other hand, the parasympathetic nervous system controls the “rest and digest” functions of the body. This is the main difference between sympathetic and parasympathetic nervous system.

Reference:

1.“Sympathetic Nervous System.” ScienceDaily, ScienceDaily.Available here
2.“Parasympathetic Nervous System.” Wikipedia, Wikimedia Foundation, 4 Sept. 2018.Available here

Image Courtesy:

1.“ 1501交感神经系统的联系”，由OpenStax College - 解剖与生理学，联系网站. , Jun 19, 2013.,(CC BY 3.0)viaCommons Wikimedia
2.”The Autonomic Nervous System”By Geo-Science-International – Own work, (CC0) viaCommons Wikimedia