Nervous System Crossword

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Across
  1. 2. nerve fibers that carry information to the central nervous system.
  2. 6. when membrane becomes permeable to potassium ions, which rapidly diffuse out of the neuron.
  3. 9. sits on top of the brain stem.
  4. 10. can result in a potentially fatal head injury.
  5. 11. carry information from visceral organs.
  6. 13. processes smell.
  7. 15. processes taste.
  8. 17. an electrochemical change in a neuron to send a signal.
  9. 20. nerve fibers that carry impulses away from the central nervous system organs to effector organs.
  10. 23. gaps in myelin sheath along the axon.
  11. 25. line cavities of the brain and spinal cord.
  12. 28. paired superior parts of the brain.
  13. 29. a slight brain injury.
  14. 33. nerve cells that are specialized to transmit messages.
  15. 36. one-sided paralysis.
  16. 41. spiderlike phagocytes that monitor health of nearby neurons and dispose of debris.
  17. 43. controls breathing heart rate and breathing.
  18. 44. sodium channels now open, and sodium diffuses into the neuron.
  19. 46. involved in our ability to speak.
  20. 49. mostly unmyelinated fibers and cell bodies.
  21. 50. activates muscles or glands.
  22. 51. attaches to the spinal cord.
  23. 54. is the middle layer of the meninges.
  24. 56. is a spatial map of touch receptors.
  25. 57. conduct impulses away from the cell body.
  26. 59. plasma membrane is inactive.
  27. 60. forms a watery cushion to protect the brain and spinal cord.
  28. 62. carry impulses to and from the spinal cord.
  29. 66. bundles of nerve fibers in the PNS.
  30. 67. houses pineal body.
  31. 69. is the outer covering of the meninges.
  32. 70. a tough membrane covering the brain and spinal cord.
  33. 71. allows us to consciously move skeletal muscles.
  34. 72. carry information from the skin, skeletal muscles, and joints.
  35. 73. nerves extending from the brain and spinal cord.
  36. 74. support cells.
  37. 75. nucleus and metabolic center of the cell.
Down
  1. 1. area receives impulses from the body’s sensory receptors.
  2. 3. processes and interprets sensory input and decides whether action is needed.
  3. 4. is the internal layer of the meninges.
  4. 5. the gap between axon terminals and the next neuron.
  5. 7. excludes many potentially harmful substances.
  6. 8. restores initial conditions of sodium and potassium using ATP.
  7. 12. bundles of nerve fibers in the CNS.
  8. 14. processes hearing.
  9. 16. an important autonomic nervous system center:
  10. 18. gathering information.
  11. 19. fibers that extend from the cell body.
  12. 21. decreased elasticity of blood vessels.
  13. 22. temporary restriction of blood flow.
  14. 24. is a spatial map of the motor area.
  15. 26. abundant, star-shaped cells that brace and anchor neurons to blood capillaries.
  16. 27. wrap axons in a jelly roll–like fashion (PNS) to form the myelin sheath.
  17. 30. controls balance and coordination.
  18. 31. conduct impulses toward the cell body.
  19. 32. include visual and auditory reflex centers.
  20. 34. produce myelin sheaths around axons of the CNS.
  21. 35. carry impulses to and from the brain.
  22. 37. made of the brain and spinal cord.
  23. 38. involved in the control of breathing.
  24. 39. white, fatty material covering axons.
  25. 40. the ability to respond to a stimulus and convert it to a nerve impulse.
  26. 42. results when blood circulation to a brain area is blocked and brain tissue dies.
  27. 45. marked nervous tissue destruction occurs.
  28. 47. a relay station for sensory impulses.
  29. 48. involuntary and controls smooth and cardiac muscles and glands.
  30. 52. voluntary and controls skeletal muscles.
  31. 53. the ability to transmit the impulse to other neurons, muscles, or glands.
  32. 55. collections of cell bodies outside the CNS in the PNS.
  33. 58. collections of myelinated fibers (tracts).
  34. 61. part of the Schwann cell external to the myelin sheath.
  35. 63. processes sight.
  36. 64. damage to speech center in left hemisphere.
  37. 65. provides a two-way conduction pathway to and from the brain.
  38. 68. functional junction between nerves where a nerve impulse is transmitted.