Biology, asked by avi2124, 1 year ago

what is sympathetic and parasympathetic nervous system ? Explain with example .

Answers

Answered by KartikSharma13
9
SYMPATHETIC NERVOUS SYSTEM--

#A part of the nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure.
#The sympathetic nervous system and the parasympathetic nervous system constitute the autonomic nervous system.

Eg--For example, the sympathetic nervous system can accelerate heart rate; widen bronchial passages; decrease motility (movement) of the large intestine; constrict blood vessels; increase peristalsis in the oesophagus; cause pupillary dilation, piloerection (goose bumps) and perspiration (sweating); and raise blood pressure.


PARASYMPATHETIC NERVOUS SYSTEM--

#The parasympathetic nervous system is one of three divisions of the autonomic nervous system.
#Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.

Eg--For example, during a fight or flight response, the SNS increases heart rate and blood pressure. Afterward, the PSNS works to slow the heart rate down and lower blood pressure.

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Answered by Praneeth331
6
The sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. The parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.
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