Nervous System Extra Credit

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Across
  1. 2. Membrane becomes more negative than resting state
  2. 3. Return to negative membrane potential after depolarization
  3. 5. Pump that moves sodium out and potassium into the
  4. 7. Electrical charge difference across the membrane at rest
  5. 9. Junction where neurons communicate
  6. 10. Division controlling voluntary movement
  7. 11. Small, localized changes in membrane voltage
  8. 15. Chemical messenger released at synapses
  9. 17. Man's best friend
  10. 18. Peripheral nervous system (all nerves outside CNS)
  11. 19. Central nervous system (brain + spinal cord)
  12. 22. Cell that transmits electrical signals in the nervous system
  13. 23. Division controlling involuntary functions
  14. 24. Branch-like structures that receive incoming signals
Down
  1. 1. When the membrane becomes more positive
  2. 4. Rapid electrical signal traveling down an axon
  3. 6. “Rest and digest” division of ANS
  4. 8. Jumping of action potentials between nodes in myelinated axons
  5. 9. “Fight or flight” division of ANS
  6. 12. Long projection that carries signals away from the cell body
  7. 13. Support cells that protect and nourish neurons
  8. 14. Fatty insulation that speeds up nerve impulses
  9. 16. Structure that relays signals between brain and body
  10. 20. Minimum stimulus required to trigger an action potential
  11. 21. Organ that processes and integrates information