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21 Cards in this Set
- Front
- Back
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Norepinepherin to alpha arenergic
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usually excitatory
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Norepinephrine to beta eadrenergic
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usually inhibitory
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both adrenergic receptors
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are g protein coupled receptors (similar to muscarine ACh receptor)
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adrenergic receptors
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alpha and beta
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beta excitatory
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beta receptors in heart are excitatory which is blockig sympathetic nervous system
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Postganglionic sympathetic
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is the only one to release ACh and norepinepherine
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receptors on neurons
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nicotinic
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___ __ receptor on _____ always
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muscarinic ACh , Target
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Target for sympathetic
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has adrenergic receptors, since it takes ACh and NE
-also has muscarinic receptors |
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adrenal medulla receptors
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has nictinic receptors since it has a touching presympathetic neuron touching it
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Dual innervation
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most of viscera recieves nerve fibers from both parasympathetic and sympathetic division
- both divisions dont normally innervate on an organ equally. |
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antagonist effect
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oppose eachother
-exerted through dual innervation of same effector heart rate decreases(para) heart rate increases(sym) pupilary dilator muscle(sym) constrictory pupilary(para) |
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parasympathetic contricts ____ muscles
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circular
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sympathetic constricts ____ muscles
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radial
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without dual innervation
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some effectors only recieve sympathetic (adrenal medulla, erector pili muscle, sweat glands, blood vessels)
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vasodilation
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decreases in firing frequency
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vasoconstriction
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increases in firing frequency
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Sympathetic ton
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baseline firing frequency
-a vasometer tone provides portal constriction (can shift blood flow from one organ to another as needed) |
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parasympathetic stimulation
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increases blood flow to skeletal and cardiac muscles, and reduces to skin
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sympathetic and vasometer Tone
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symp. division prioritizes blood vessels to skeletal muscle and heart i time of emergency
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symp. and skin blood vessels
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vasoconstrict to minimize bleeding if injury occurs during stress or exercise
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