Don't be Nerve-ous

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Across
  1. 2. what would happen if you severed a nerve
  2. 7. the number of nerves that form the brachial plexus
  3. 8. a short-branched extension of a nerve cell that receives impulses from other cells
  4. 13. peripheral nerve that innervates the triceps
  5. 16. nerves that carry signals away from the central nervous system
  6. 17. frontal, parietal, temporal - for example
  7. 19. the cranial nerve that controls heart rate, breathing, and digestion
  8. 20. "rest and digest" response of the nervous system
  9. 22. symbol for Sodium on the periodic table of elements
  10. 23. the outermost and toughest of the three meningeal layers that surround the brain and spinal cord
  11. 24. the number for the olfactory cranial nerve
  12. 25. abbreviation for neuron pathways originating in spinal cord that innervate muscles directly (Hint: part of abbreviation is in the clue)
Down
  1. 1. the name of French physician that discovered the gap between adjacent Schwann cells (Hint: Nodes of)
  2. 3. nerves that interact directly with the spinal cord to modulate motor and sensory information from the body's periphery
  3. 4. what you call a bundle, or network, of interlacing nerves
  4. 5. fatty substance that insulates nerves
  5. 6. peripheral nerve that innervates the quadriceps
  6. 9. the process which causes the inside of the cell to be less negative compared to the outside of the cell
  7. 10. "fight or flight" response of the nervous system
  8. 11. reduced or decreased sensitivity to sensory stimuli, often called "numbness"
  9. 12. type of nerves that innervate internal organs, smooth muscle, and form part of the autonomic nervous system
  10. 14. peripheral nerve that innervates the adductor longus
  11. 15. what you call a nerve that has both sensory and motor components
  12. 18. another name for the cell body of a neuron
  13. 21. nerves that carry signals towards the central nervous system