nerve

Human Anatomy, Physiology, and Medicine. Anything human!

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victor
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nerve

Post by victor » Sun Jun 05, 2005 1:57 pm

How can we differ the works of sympathetic and parasmphatetic nerve in our body...sometimes I got confused to differ it..which one stimulate to become faster and which one stimulate become slower?

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mith
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Post by mith » Sun Jun 05, 2005 3:39 pm

it's not any specific nerve but it's a response type

sympathetic- fight or flight
parasympathetic - rest and digest
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

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Post by ewokgod » Wed Jun 08, 2005 4:37 pm

parasympathetic and sympathetic nerves belong to the autonomous nervous system.
therefore, their works are involuntary. usually, during an action, only either one of them is in action, the other one is inhibited.
as mithrilhack said
sympathetic nerves are associated with fight or flight
an example of this is when you're doing sport. sympathetic nerves instigate the release of adrenaline from the adrenal glands to the body. the result of this is vasoconstriction (narrowing of blood vessels) and your blood pressure rises, in addition, your heart beats faster.

parasympathetic nerves basically oppose the actions of sympathetic nerves. instead of vasoconstricting your vessels, they dilate it. thus blood flows slower and blood pressure drops. this usually happens when you are resting. also, when you rest, they tell your digestive system to break down food. hence the term rest and digest.

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Post by mr bollocks » Mon Jun 13, 2005 9:31 am

rest and digest!!

my parasympathetic nervous sysytem must be working on overload all the time!!

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