Autonomic nervous system - Wikipedia, the free encyclopedia
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The autonomic nervous system ( ANS or visceral nervous system ) is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness, a...
en.wikipedia.org/wiki/Autonomic_nervous_system
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����PostPost-ganglionic ganglionic neurotransmitter for the neurotransmitter for the parasympathetic nervous system parasympathetic nervous system;
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www.ehs.net/2231/pdf/autonomic.pdf
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In short, the parasympathetic system returns the body functions to normal after they have been altered by sympathetic stimulation. In times of danger, the sympathetic system prepares the body for violent activity.
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users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/PNS.h...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/PNS.html
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parasympathetic nervous system ... Two more facts about the sympathetic nervous system: the synapse in the sympathetic ganglion uses acetylcholine as a neurotransmitter; the synapse of the post-ganglionic neuron with the target organ uses the neurotransmitter called norepinephrine.
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faculty.washington.edu/chudler/auto.html
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Cholinergic receptors (receptors binding acetylcholine) also are found in the sympathetic system (as well as the parasympathetic system). Nicotinic cholinergic receptors cause sympathetic postganglionic neurons, adrenal chromaffin cells, and parasympathetic postganglionic neurons to fire and release their chemicals.
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www.becomehealthynow.com/article/bodynervousadvanced/82...
www.becomehealthynow.com/article/bodynervousadvanced/822
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Both systems innervate the same organs and act in opposition to maintain homeostasis. For example: when you are scared the sympathetic system causes your heart to beat faster; the parasympathetic system reverses this effect.
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookNERV....
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookNERV.html
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overview of the parasympathetic and sympathetic nervous systems ... In physiological terms, the parasympathetic system is concerned with conservation and restoration of energy, as it causes a reduction in heart rate and blood pressure, and facilitates digestion ... Parasympathetic nervous system Sympathetic nervous system...
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www.nda.ox.ac.uk/wfsa/html/u05/u05_010.htm
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General properties of the Sympathetic Nervous System. ... Constriction of arterioles in skin, digestive system, and non-exercising muscles. ... The Sympathetic system can also act selectively in some reflexes.
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physioweb.med.uvm.edu/ans_physiology/overview_frame/sym...
physioweb.med.uvm.edu/ans_physiology/overview_frame/sympathetic.htm
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