Module 7 A/P Nervous System

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Across
  1. 3. these neurons carry messages away from the CNS to effector organs
  2. 5. step in the action potential when Na+ channels open
  3. 6. type of neuroglial cell that forms the blood-brain barrier
  4. 8. Na+ channels are opened on the postsynaptic neuron in this type of chemical synapse
  5. 9. ependymal cells have this structure which moves CSF around
  6. 10. these nerves originate from the spinal cord
  7. 11. K+ channels are opened on the postsynaptic neuron in this type of chemical synapse
  8. 12. acronym for the system of PNS neurons that transmit action potentials from the CNS to skeletal muscles
  9. 16. these nodes are gaps in the myelin sheath of the axon
  10. 20. this is a slower type of conduction which occurs in unmyelinated neurons
  11. 21. the level of stimulus needed to trigger an action potential
  12. 22. this division of the ANS regulates resting and nutrition-related functions
  13. 23. type of neuroglial cell that fights infections
  14. 25. neuroglia found in the PNS
  15. 26. these neurons carry messages from the sensory organ to the CNS
  16. 28. part of the neuron that marks the end of the cell body and beginning of the axon
  17. 29. this type of difference measures the charge across the cell membrane
  18. 30. this nervous system refers to PNS neurons that transmit messages from the CNS to smooth muscles, cardiac muscles and glands
  19. 31. neural circuit where several presynaptic neurons transmit signals to 1 postsynaptic neuron
Down
  1. 1. bundle of neuron axons and their coverings found outside of CNS
  2. 2. type of neuron in the CNS that transmits signals from one neuron to another
  3. 4. ability to undergo an action potential in response to a stimulus
  4. 7. neuroglia found in the CNS
  5. 12. the "S" from SMNS
  6. 13. collections of neuron cell bodies found outside the CNS
  7. 14. these bring messages into the cell body
  8. 15. Na+ channels in axon membrane are opened causing Na to diffuse in and make membrane less negative
  9. 17. the period of time when a new action potential can not be generated
  10. 18. neural circuit where one input creates many outputs
  11. 19. these nerves originate from the brain
  12. 24. number of axons a neuron has
  13. 25. the type of conduction when the signal jumps from node to node (of Ranvier)
  14. 27. this division of the ANS generally prepares body for increased energy expenditure