The Nervous System

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