Autonomic Nervous System
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| Autonomic Nervous System | motor system. Controls cardiac muscle, smooth muscle, glands. 2 Neuron chain.
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| Where are the centers for the ANS? | In PNS and CNS. Hypothalamus, brainstem, spinal cord
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| Somatic motor | skeletal muscle. 1 neuron(motor). Thick heavily myelinated
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| Visceral motor | ANS - glands, smooth, and cardiac muscle. 2 Neuron chain. Pre and post ganglionic. Thin and unmyelinated.
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| 2 Divisions of ANS and differences | Sympathetic and parasympathetic. Differ in location of pre+post neuron, neurotransmitter, effect
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| Sympathetic ... where is the pre neuron | T1-L2 = thoracolumbar
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| Sympathetic... where is the post neuron | sympathetic chain or prevertebral ganglia(in front of aorta)
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| Splanchnic nerve | postganglionic neuron of sympathetic synapases with another post ganglionic
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| sympathetic preganglionic neurotransmitter | acetylcholine
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| sympathetic postganlionic neurotransmitter | norepinephrine
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| Sympathetic general effect | flight or fight
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| Adrenal Medulla | on top of kidneys. secretes epinephrine/norepinephrine. Cells derived from post-gang neurons
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| parasympathetic 1st neuron | "craniosacral" - originates along here. Nuclei of cranial nerves 3(eye), 7(lacrimal), 9(salivary), 10(heart/stomach/lungs, Sacral (2,3,4)
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| parasympathetic post ganglionic | on or near the target organ
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| neurotransmitter of parasympathetic | acetylcholine
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| general effect of parasympathetic | rest and digest
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| heart rate up | sympathetic
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| herat rate down | parasympathetic
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| smooth muscles of bronchioles dialate | sympathetic
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| smooth muscles of bronchioles constrict | parasympathetic
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| urinary bladder relax to fill | sympathetic
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| urinary bladder expel | parasympathetic
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| digestive tract increase movement | parasympathetic
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| digestive tract decrease movement (reduce peristalsis) | sympathetic
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| sweat glands stimulate | sympathetic
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| arrector pili muscles create goosebumps | sympathetic
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| eye dialates (contract muscles of iris) | sympathetic
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| pupil constricts (muscles of iris relax) | parasympathetic
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| vascoconstriction | making blood more available for heart and skeletal muscle - associated with sympathetic
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