synapses and nervous communication

• • primary purpose of synapses is to connect 2 neurones so that a signal may be passed between them
  • they also ensure that messages are passed along a specific pathway
  • synapses also allow a far wider range of responses than if neurones were physically connected to each other
  • however, synapses usually involve more than one neurone
  • nerve junctions can involve several neurones converging on one neurone or one neurone sending out signals to several different neurones that diverge to different effectors
• converging circuit

  
• diverging circuit