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Nervous System cont. (Synapse (Chemical (NMJ or NNJ (NMJ only ACh, NNJ…

- - - - Sodium channels open
        
        Electric current travels through ICF to next node
        
        Opens the sodium gates and next node
        
        Behind, potassium channels open
        
        Send current from node to node
  - - - Potasssium open
        
        Continues like domino's
- - - - Strong stimuli causes AP to be generated more
        
        Determined by frequency of AP not increase in strength of single AP
  - - - Graded potentials do not exhibit this
    - - Comes after absolute
      - Sodium channels resting, some potassium ions open
      - Strong stimuli can cause more frequent generation of AP
- - - - Gap junctions
  - - - NMJ only ACh
      - NNJ dozens of neurotransmitters
    - - Neurotransmitter location
        
        AP triggers exocytes of neurotransmitter
- - - - One or more presynaptic neurons transmit impulses in rapid fire order no NTs released in quick succession
    - - Postsynaptic neuron is stimulated at same time by large number or terminals
    - - Inhibitory most effective when placed between excitatory synapses and axon hillock