The Nervous System

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Across
  1. 3. processes and interprets the input and makes sense of the decisions
  2. 4. fibers that extend from the cell body
  3. 6. occurs when potassium flowing out of the cell reestablishes the electrical conditions within the cell
  4. 8. part of the PNS and conveys impulses to to the CNS
  5. 9. means that there are fewer positive ions inside the cell than outside the cell
  6. 11. occurs when sodium enters the cell after being stimulated by a neurotransmitter
  7. 13. supporting cell of the CNS that nourishes the neurons
  8. 15. will communicate with the heart, digestive system, and endocrine glands
  9. 20. conducts impulses away from the cell body
  10. 21. abbreviation for the part of the nervous system that includes all nerves outside of the brain and spinal cord
  11. 22. the part of the axon in between the myelin sheath links
  12. 23. junction between neurons
  13. 25. gathers information and monitors changes
  14. 26. part of the PNS motor division that communicates to the skeletal system
  15. 28. body system that has the same function as the nervous system
  16. 29. garbage men of the CNS
  17. 30. protective cells of the PNS
  18. 32. part of the PNS that carries impulses to the effector organs
  19. 33. part of the neuron that contains the usual organelles and nucleus
Down
  1. 1. conduct impulses toward the cell body
  2. 2. fatty substance that wraps around the axon
  3. 5. create the myelin sheath around the CNS neurons
  4. 7. division that stimulates the fight or flight response
  5. 10. disease that occurs when the body starts to kill all of the oligodendrocytes
  6. 12. the resting charge on the inside of the neuron
  7. 13. contains vesicles with neurotransmitters
  8. 14. the somatic division is under __________________ control
  9. 16. the gap between adjacent neurons
  10. 17. PNS cells that serve the same function as oligodendrocytes
  11. 18. effects a response
  12. 19. effector organs for the motor division include muscles and ______________
  13. 24. division that stimulates the rest and digest response
  14. 27. there is a higher concentration of sodium ________________ the neuron
  15. 31. abbreviation for the part of the nervous system that includes the brain and spinal cord