Autonomic System: Understanding Sympathetic & Parasympathetic Impulses

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In summary, the sympathetic and parasympathetic nervous systems both send signals to the same organs, but the overall response depends on the intensity of the opposing signals. The sympathetic system is responsible for activating the body for more active behavior, while the parasympathetic system promotes relaxation and digestion. The body strives for a balance between these two systems, with signals sent through different pathways. However, a difference in intensity can trigger a feedback response cycle and one system may dominate over the other. This can be seen in situations such as calming down after being upset or gaining energy upon waking up.
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rashida564
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what does mean "Both the sympathetic and parasympathetic systems relay impulses to thesame organs, but the overall response depends on the intensities of the opposing"
 
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The sympathetic NS, generally speaking, signals various tissues and organs to change their functioning and metabolism to a state more appropriate for more active behavior. Its might be involved in flight or fright responses (in the extreme).
The parasympathetic signals direct tissues to chill out, relax, and do digestion.
These are kind of behavioral opposites so the two inputs are, in some way, weighted at the target organ(s), resulting in some level of arousal, at or between the two extremes.
 
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The body strives for a balance with opposing signals in the two systems. They are sent through different pathways: The cranial nerves are the pathways for the PSNS signals and the spinal nerves are the pathways for the SNS signals. They normally balance each other out; however, a difference in 'intensity' of signalling will trigger a feedback response cycle and one system will dominate over the other. Think about long it takes to calm down when upset, or how long it takes to gather some energy upon waking.
 
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1. What is the autonomic system?

The autonomic system, also known as the autonomic nervous system, is responsible for regulating involuntary body functions such as heart rate, digestion, and breathing. It is made up of two branches: the sympathetic nervous system and the parasympathetic nervous system.

2. What is the difference between the sympathetic and parasympathetic nervous systems?

The sympathetic nervous system is responsible for the body's "fight or flight" response, while the parasympathetic nervous system is responsible for the body's "rest and digest" response. The sympathetic nervous system increases heart rate and respiration, while the parasympathetic nervous system slows them down.

3. How do sympathetic and parasympathetic impulses work?

In the sympathetic nervous system, impulses are triggered by stress or danger and cause the release of adrenaline, which prepares the body for action. In the parasympathetic nervous system, impulses are triggered by relaxation and cause the release of acetylcholine, which helps the body relax and recover.

4. What are some common symptoms of an imbalance in the autonomic system?

Some common symptoms of an imbalance in the autonomic system include high blood pressure, rapid heart rate, digestive issues, and changes in body temperature. These symptoms can be caused by various factors, such as stress, illness, or medication.

5. How can one maintain a healthy balance in the autonomic system?

Maintaining a healthy balance in the autonomic system can be achieved through practices such as exercise, stress management techniques, and healthy eating habits. It is also important to address any underlying medical conditions that may be causing an imbalance in the autonomic system.

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