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Unformatted text preview: 2-13-08 anatomy notes1.Organ Systems2.Nervous Systema.Peripheral Nervous Systemi.Autonomic Nervous System (part of the PNS that is NOT under voluntary control)1.General Autonomic Principlesa.Autonomic Antagonism and Dominancei.Applies ONLY to organs receiving dual innervationii.Antagonism-NTs have opposite effectsiii.Dominance-system releasing greater quantity of 2 transmitters displays dominant effectorb.Sensesi.Sensory Unit (basic unit)1.Receptor-always have onea.Special cellb.Specialized region sensory axon2.Neural Pathwaya.Cranial NerveBrainb.Spinal NerveSpinal CordBrain3.Interpretation Center in Cerebral Cortex (gray matter)ii.Receptors1.Specificity-VERY specifica.Specifically respond to one kind of stimuli2.Functiona.Create generator potentials (local depolarizations)b.Summate into action potential to sensory neuroniii.Types1.Exteroreceptors-responds to stimuli that originate outside the bodyi.Located in: skin, tongue, nasal cavities, ear, eyeb.Cutaneous Receptors (or skin receptors)-located in dermis...
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