Nervous system

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Across
  1. 3. Electrical signal traveling down a neuron
  2. 5. Neuron that carries commands from the brain to muscles
  3. 8. Part of the neuron that receives signals
  4. 9. Fight or flight division of the nervous system
  5. 10. Space where two neurons communicate
  6. 12. When the neuron returns to resting charge
  7. 15. Normal electrical charge of a resting neuron
  8. 17. Rest and digest division of the nervous system
  9. 19. Division that controls voluntary muscle movement
  10. 21. Pump that moves sodium and potassium across the membrane
  11. 22. A nerve cell that sends messages in the body
  12. 24. Neuron that carries information to the brain
Down
  1. 1. When the neuron becomes more positive
  2. 2. Receptor used for tasting food
  3. 4. Structure in the ear used for hearing
  4. 6. Chemical released to pass signals between neurons
  5. 7. Fatty covering that speeds up nerve signals
  6. 11. Light detecting cell in the eye
  7. 13. Minimum signal needed to start a nerve impulse
  8. 14. Small local change in electrical charge
  9. 16. Cells that support and protect neurons
  10. 18. Long part of a neuron that sends signals away
  11. 20. Division that controls automatic body functions
  12. 23. Related to the sense of smell