Nervous system

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Across
  1. 3. type of neuroglia that supports neurons
  2. 5. membrane is less permeable to this ion
  3. 7. long fibers, nerve ends releases neurotransmitters
  4. 10. state in which the resting potential is reversed
  5. 12. bundle of axons in the PNS
  6. 13. refractory period in which sodium channels return to their original state and some potassium are still open
  7. 15. refractory period from sodium channels open until they return to their natural state
  8. 16. sodium channels inactivate, potassium channels open
  9. 18. subdivision of the PNS activated as a 'fight or flight' response
  10. 19. positive intracellular ion in resting state
  11. 20. gated channels closed, voltage -70mV
Down
  1. 1. Conducts local currents toward the soma
  2. 2. motor division that regulate activity of involuntary muscles
  3. 4. motor division that conducts impulses from the CNS to skeletal muscles (voluntary)
  4. 6. sodium channels reset
  5. 8. Junction of close contact between neurons
  6. 9. a resting neuron on the inside is
  7. 11. bundle of axons in the CNS
  8. 14. the membrane is less permeable to this ion
  9. 17. true or false, a charge separation exists at the membrane
  10. 18. where organelles are found