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Nervous system , Movement, Wakefulness and Sleep, Vision, Anatomy, Other…

- - - - Afferent: Brings information to a structure
      - Efferent: Bring information away from a structure ("e" exit)
      - Interneuron/ intrinsic neuron: tentrites and axon are entirely within a single structure
- - - - Protein-mediated process that pump chemicals from blood into brain (Glucose/ Amino acids/ Purines/ Choline/ Vitamins/ iron)
- - - - Chloride (Cl) : mainly outside the cells
    - - Potassium ion channels remain open ; Sodium ion channels always closed when rest
    - - Potassium (K): more than 10x more ions inside > outside
      - Sodium (NA): more than 10x more ions outside > inside
  - - - Take space
      - some functions don't need high sped transmission of signals
      - Costs energy to myelinated all cells
      - Slowef transmission of signals ca result in different feelings
- - - - Cannabinoids and Cpsaicin
      - Electrical stimulation of the neervous system
      - Placebos
      - Gate control theory of pain
      - Opiods and endorphins