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20 Cards in this Set
- Front
- Back
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define ANS:
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closely related with both CNS and PNS; involved in innervatino of viscera, glands, smooth muscle
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what is parasympathetic division?
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craniosacral outflow
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what is sympathetic division?
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thoracolumbar outflow
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what is enteric?
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nerve cells in intestinal tracts considered independent from PNS and SNS
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how does somatic innervation work?
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innervation of sk. m in which axons leave spinal n, synapse with respective endplates
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what is a somatic synapse/innervation
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one neuron synapse
Ach = NT to respoctive nicotinic receptor |
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how does visceral innervation work?
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two neuron synapse
NT and receptor varies with SNS/PNS/adrenal medulla/symp. chlolinergic |
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where are parasym. pregang cell bodies?
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CN 3, 7, 9, 10
sacral spinal cord S2-S4 |
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how are preganglionic parasymp. fibers?
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long
synapse with autonomic gangila located near wall of viscera being innervated |
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what is pregan. parasymp NT?
where is synapse? how are post gang. fibers? what is post gang. NT? |
Ach; synapse with nicotinic receptor at autonomic ganglion
fibers are short; synapse with muscarinic receptors at resective viscera/organ post gang NT = Ach |
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where are preganglionic sympathetic cell bodies?
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T1-L3
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what are pregan. symp fibers like/where do they synapse?
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short
synapse with ganglia in symp. chain or prevertebral/preaortic ganglia |
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pregang. symp. NT?
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Ach-->nicotinic receptor
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post ganglionic symp. fibers?
post gang. NT? receptor? |
long, synapse with viscera/organ
NE--receptor is alpha 1, 2 or beta 1, 2 |
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what is sympathetic cholinergic system
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innervates sweat glands
still has short pregang/long post gang fibers but postgang NT = Ach -->muscarinic receptor |
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what is adrenal medulla synapse?
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one neuron synapse innervating adrenal medulla-->systemic symp response
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what is NT of adrenal medulla?
what happens after synapse |
Ach to nicotinic receptor
after stimulation of nicotinic receptor: 25% release NE, 75% release epi into bloodstream (endocrine response |
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ANS affects on eye
PNS SNS |
SNS: pupillary dilation (mydirasis)
PNS: pupillary contstriction (miosis) |
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ANS affects on heart
SNS PNS |
SNS: increased HR, contractility, conduction
PNS: decreased HR, contractility, conduction |
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AND effects on arterioles
SNS PNS |
SNS: constriction
PNS: dilation |
