NERVOUS TISSUE. POLARIZED NEURON Intracellular Environment More Negative -70mV Sodium Potassium Facilitated Exchange Pump Activated Ionic Gates Closed.

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Presentation transcript:

NERVOUS TISSUE

POLARIZED NEURON Intracellular Environment More Negative -70mV Sodium Potassium Facilitated Exchange Pump Activated Ionic Gates Closed Potassium Greater Concentration Inside Sodium Greater Concentration Outside Chloride Greater Concentration Outside

DEPOLARIZED NEURON Intracellular Environment Less Negative +30mV Sodium Potassium Facilitated Exchange Pump Deactivated Na+ Gates Open Na+ Ionic Influx Exocytosis of Neurotransmitter

FACILITATED TOWARD EXCITATION Intracellular Environment Less Negative -69mV Sodium Potassium Facilitated Exchange Pump Deactivated Na+ Gates Open Na+ Ionic Influx

EXCITATORY POST SYNAPTIC POTENTIAL EPSP Intracellular Environment Less Negative -65mV Sodium Potassium Facilitated Exchange Pump Deactivated Na+ Gates Open Na+ Ionic Influx

REPOLARIZING NEURON Intracellular Environment Approaches Zero 0mV Sodium Potassium Facilitated Exchange Pump Still Deactivated K+ Gates Open K+ Ionic Out flux Refractory Period

INHIBITORY POST SYNAPTIC POTENTIAL IPSP Intracellular Environment More Negative -71mV Sodium Potassium Facilitated Exchange Pump Activated Cl- Gates Open Cl- Ionic Influx

SPATIAL SUMMATION Several Presynaptic Neurons Release Simultaneously Post Synaptic Integration Post Synaptic Qualitative Analysis Post Synaptic Quantitative Analysis Post Synaptic Summation

TEMPORAL SUMMATION Presynaptic Neuron Releases One Synaptic End Bulb Temporally Post Synaptic Neuron Integration Post Synaptic Qualitative Analysis Post Synaptic Quantative Analysis Post Synaptic Summation