Neural Communication

• action potential


  brief electrical impulsess that travel down the neuron
• threshold


  level of stimulation required to trigger a neural impulse
• refractory period

  a recovery period following all-or-none response
• all-or-none response

  a neuron fires completely or not at all
• reuptake

  terminal buttons of the sending neuron reabsorb leftover neurotransmitters after delivering messages
• agonist

  a substance that activates the receptors for certain neurotransmitters, minimizes/strengthens the effect of a certain neurotransmitter
• examples of agonists? which neurotransmitter do they mimic

  heroin, oxycodone, methadane, & morphine, all mimic endorphins