Nervous system 1

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Across
  1. 1. cells that create myelin sheaths in the PNS
  2. 4. cells in the CNS that create myelin sheaths
  3. 6. ions that flood into the cell during depolarization
  4. 8. consists of the brain and spinal cord
  5. 11. neuron with many extensions from the cell body
  6. 15. cells that clean up debris
  7. 16. CNS glial cell that anchor neurons to blood capillaries
  8. 17. gap between axon terminal and the next neuron
  9. 18. helps insulate and speed up nerve transmission
Down
  1. 1. pump that restores the cell to resting membrane potential
  2. 2. consists of all of our nerve fibers
  3. 3. a three neuron reflex arc
  4. 5. glial cells that help circulate cerebrospinal fluid
  5. 7. neuron with one axon and one dendrite
  6. 9. subdivision at work during fight or flight
  7. 10. subdivision that controls skeletal muscles
  8. 12. also known as the efferent division
  9. 13. also known as the afferent division
  10. 14. ions that move out of the cell during repolarization
  11. 19. cells in the PNS that cushion cell bodies