1. Neuropsychology/ Biological Psychology
    is the study of how biological processes relate to behavior and mental processes.
  2. Neuron
    is a nerve cell
  3. what does a neuron do
    • sends, receives and integrates information throughout the body
    • the basic unit of communication
    • it is a tiny, information processing system with thousands of connections
  4. Glial cells
    • are the “glue” that holds neurons in place and supports them
    • 90% of our brain cells are glial cells. They clean up and insulate neurons so we don’t scramble our communications.
  5. Dendrite
    receives all incoming information from other neurons
  6. Cell Body/ Soma
    • the cell’s life support center
    • contains everything that keeps the cell going.
  7. Axon
    several feet long, which is why it might take a second or two for you to feel pain
  8. Myelin sheath
    • a fatty tissue that helps the message travel quickly
    • on the axon
  9. Terminal buttons
    they release neurotransmitters
  10. synapse
    tiny gap between each neuron
  11. how a message travels
    dentrite - cell body - axon - terminal buttons - synapse - next neuron
  12. Resting Potential
    • when neuron is at rest
    • negative charge inside the axon
  13. Action potential
    • shifts in neurons electrical charge
    • positive chargers rush in
  14. Properties of Action Potential
    • 1. All or None Law
    • 2. All neural impulses are the same size
    • 3. Self Propagating
  15. Presynaptic Neuron
    sends the message
  16. Postsynaptic Neuron
    Receives the message
  17. Neurotransmitter
    • chemical that is released from the terminal button of the presynaptic neuron and carries the message across the synapse to the postsynaptic neuron
    • neurotransmitter binds to a receptor site on the dendrite of a postsynaptic neuron
  18. Postsynaptic Potential
    reaction occuring when the neurotransmitters reach the postsynaptic neuron
  19. Excitatory PSP
    positive voltage keeps message going
  20. Inhibitory PSP
    negative voltage shift that stops message from continuing
  21. after the neurotransmitter causes the postsynaptic potential, it either
    • 1. drifts away and is deactivated
    • 2. or it is reabsorbed by the presynaptic neuron in a process called reuptake
  22. Absolute Refractory Period
    cell can’t be activated for 1 -2 miliseconds after action potentional occurred
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