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Nervous System, Step 1, Step 2, Step 4, Step 5, Step 6, Step 3, image -…

- - - - calcium channels open and Ca2+ ions enter the presynaptic membrane
  - - - undergo exocytosis
  - - - postsynaptic membrane
        
        thus changing its membrane
        
        potential and resulting in 1 of the following:
        
        Depolarization occurs
        
        EPSP/AP/message transmitted
        
        Na+ channels on the postsynaptic membrane will open
        Na+ ions enter
        
        Hyperpolarization occurs
        
        IPSP/no AP/no message transmitted
        
        K+ channels on the postsynaptic membrane will open
        K+ ions leave
        
        Cl- channels on the postsynaptic membrane will open
        Cl- ions enter
- - - - Motor-end-plate/Neuromuscular
        
        neuro-muscle
      - Neuro-glandular
        
        neuron-gland
      - Neural
        
        neuron-neuron
        
        Presynapse
        
        axon terminals
        
        Postsynapse
        
        either: dedrite, cell body, or axon
    - - Excitatory Synapse/EPSP
        
        AP on postsynapse
      - Inhibitory Synapse/IPSP
        
        No AP on postsynapse
  - - - space between presynaptic and postsynaptic membranes
    - - membrane having receptors for specific neurotransmitters
    - - terminal part of the axon
      - rich in vesicles containing neurotransmitters
- - - - depending on the receptors of the postsynaptic membrane
        
        Excitatory
        
        Inhibitory