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lecture 32 nervous systems and animal neurosensory systems 3 basic neurosensory processes : 4 recieve information - requires receptors sensory 4 integrate information - requires processing system 4 initiate an appropriate response - requires motor pathways & effectors use neurons Neurons Dendrites - collect electrical signals cell body - integrates incoming signals generates outgoing signal to axon axon - passes electrical signals to denarites of another cell or to an effector cell action potential 150 4 resting state : membrane potential @ - channel Na+ gate closed, 0 2 Na+ gate open 4 depularizing phase resting potential causes Na+ 2 activ. gate TO open & membrare -100 time potential to rise as Na+ nows in 4 repolarizing phase once potential reaches +40 mV, gate no more The 3 K+ opened K+ can diffuse out. membrane potential undershoot : at activ. gate 2 close. slight las in closing K+ causes slight undershoot in