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Did you ever wonder how your body processes are regulated on a daily basis? For example, the rate of breathing or your blood pressure? In this explanation, we'll look at a part of the nervous system that takes care of all of this: the autonomic nervous system. We'll look at the specific functions of this part of the nervous system and its dysfunctions and compare the somatic and autonomic nervous systems.
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The autonomic nervous system is part of the peripheral nervous system responsible for regulating involuntary bodily functions such as heart rate and digestion. We don't need to think about these functions, so the autonomic nervous system works unconsciously. The autonomic nervous system also connects the brain to the endocrine system. This system releases hormones into the bloodstream. The autonomic nervous system is split into the sympathetic nervous system and the parasympathetic nervous system.
Sympathetic nervous system
The sympathetic nervous system is primarily responsible for the fight-or-flight response. This response is activated when you face acute stress to allow the body to react quickly to the situation. The body may display some physical signs to suggest the flight-or-flight response has initiated, such as dilated pupils, pale or flushed skin, fast heartbeat, and increased breathing rate.
Parasympathetic nervous system
After the stressor is over, the parasympathetic nervous system works to relax the body and bring it back into a calm condition. Some physical body signs are slower heart rate and decreased breathing rate.
Two important neurotransmitters used in the autonomic nervous system are acetylcholine (works in the parasympathetic nervous system) and norepinephrine/noradrenaline (a hormone that works in the sympathetic nervous system).
Stress activates the sympathetic nervous system and the fight-or-flight response, pixabay.com
Autonomic dysfunction also referred to as dysautonomia, is a condition in which the autonomic nervous system does not work effectively. Autonomic dysfunction occurs when the nerves in the autonomic nervous system don't work as they should, which can affect the functions of the autonomic nervous system leading to problems with these functions. Other symptoms of autonomic dysfunction include dizziness, sweating too much/too little, digestive problems, sexual problems and vision problems such as trouble adjusting from light to dark.
The somatic and autonomic nervous systems are parts of the peripheral nervous system; however, they have different functions. As we have learned, the autonomic nervous system functions unconsciously on involuntarily body processes. The somatic nervous system is the voluntary nervous system. It connects the central nervous system (brain and spinal cord) to our body's muscles by sending messages through neurons to control voluntary movements.
An example of the somatic nervous system: you go for a run and spot a big puddle in your path. Your brain will send signals to your muscles to take action and move away from the obstacle. The somatic nervous system enables our body to move out of the way of the puddle.
A woman running, www.freepik.com/vectors/morning-exercise, morning exercise vector created by pch.vector
The main difference is that the somatic nervous system is responsible for controlling voluntary movements. Meanwhile, the autonomic nervous system is responsible for involuntarily bodily functions.
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What is the autonomic nervous system?
The autonomic nervous system regulates involuntary bodily functions such as heart rate and breathing.
Which organs are controlled by the autonomic nervous system?
The autonomic nervous system controls many organs including the stomach, liver, lungs, heart, spleen, colon, appendix, kidneys, and uterus.
What is the difference between the somatic and autonomic nervous system?
The main difference is the somatic nervous system is responsible for voluntary bodily movements while the autonomic nervous system is responsible for involuntary bodily functions.
What is the main function of the autonomic nervous system?
The autonomic nervous system represents a part of the peripheral nervous system that is mainly responsible for involuntary bodily functions, such as regulating the rate of breathing, heartbeat and also digestion processes. The sympathetic nervous system, part of the autonomic nervous system, is responsible for the fight-or-flight response.
What is an example of the autonomic nervous system?
Examples of the bodily functions the autonomic nervous system controls are heart rate, breathing, sexual arousal, salivation and digestion.
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