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Download Psychobiology Neurons= transmit information, human brain has 86
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Psychobiology Neurons=transmitinformation,humanbrainhas86billion Anatomyofaneuron • Dendrites=branchlikestructures,receiveinformation • Soma/cellbody=protectsnucleus,phospholipidbilayermaintainsnegativecharge • Axonhillock=gatekeeperoftransmissions,sumsgradedpotentialtodeterminefiringof actionpotential • Axon=longnervefiberconductingelectricalsignalsfromcellbody • Myelinsheath=coatinginsulatingaxontoallowfastersignaling o ProducedbySchwanncells o NodesofRanvier=gapsbetweenmyelin,helpselectricalsignalsjump • Axonterminals/terminalbuttons=chemicalmessagereleased,presynapticarea Multiplesclerosis(MS)=autoimmunedisease • Failureofcellsthatmyelinateaxons->reducedspeedofsignaltransmission-> musculoskeletalproblems Neuronclassificationbytype • Multipolar=manydendricsites,axonjoinedtoaxonterminalsbycollateralaxon branches • Bipolar=onedendricbranchconnectedtooneaxon+axonterminals • Unipolar=dendritesconnectedtotriggerzone(notaxonhillock),linkedtoaxon+axon terminals