Psychology Midterm 1: Neurons

  1. terminal branches & buttons
    amplify signal
  2. electrical signal
    due to ions, along axon
  3. chemical signal
    due to neurotransmitters @ presynaptic terminal
  4. How is AP fired?
    • excitatory signal - inhibitory signal > threshold
    • resting neuron = negative
    • excitatory signal--> more positive
    • inhibitory signal--> more negative
  5. depolarization
    more positive ions flow in
  6. repolarization
    channels close, return to negative state
  7. reuptake of neurotransmitters
    stops neurotransmitter action
  8. AP vary in...
    • frequency, not strength
    • all-or-none firing
  9. agonist
    drug that enhances neurotransmitter action
  10. antagonist
    inhibit neurotransmitter action
  11. sympathetic
    fight or flight
  12. parasympathetic
    rest
  13. plasticity
    ability for brain to adapt as a result of injury
  14. glutamate
    • excitatory neurotransmitter aa
    • aid learning & memory in hippocampus
  15. epilepsy
    high glutamate, low GABA--> over firing neurons
  16. GABA
    • inhibitory neurotransmitter aa
    • reduce anxiety
  17. serotonin
    • system neurotransmitter produced in brainstem
    • influences arousal, sleep, emotions, dreaming
  18. depression
    not enough serotonin
  19. dopamine
    • system neurotransmitter in basal ganglia & frontal lobe
    • reward, motivation, voluntary movement
  20. schizophrenia
    too much dopamine
Author
kwatanabe20
ID
328636
Card Set
Psychology Midterm 1: Neurons
Description
Intro to Psychology
Updated