Intro to Nervous System

123456789101112131415161718192021222324
Across
  1. 5. class of support cells within the nervous system
  2. 10. number of processes in a unipolar neuron
  3. 11. division of the PNS that governs involuntary action
  4. 13. __________ nervous system: contains the brain and spinal cord
  5. 17. ion that rushes into a neuron during depolarization
  6. 18. ________ of Ranvier: gaps in the myelin sheath along which an impulse travels
  7. 19. cell capable of transmitting electrical impulses; possesses a cell body and processes
  8. 20. division of the autonomic nervous system that controls the flight or fight responses
  9. 21. the division of the PNS that detects input and sends impulses to the CNS
  10. 22. ______ cell: type of cell responsible for producing the myelin sheath on an axon in the PNS
  11. 23. body system that works closely with the nervous system to control the body's functions
Down
  1. 1. division of the autonomic nervous system that is responsible for controlling resting body function
  2. 2. division of the PNS that governs voluntary action
  3. 3. a branching process that receives an impulse and transmits it to the cell body
  4. 4. ion that rushes out of a neuron during depolarization
  5. 6. a chemical messenger released which passes an impulse to the next neuron
  6. 7. a process along which a signal is transmitted away from the cell body
  7. 8. where two neurons meet
  8. 9. ___________ nervous system: contains all the nerves outside of the brain and spinal cord
  9. 12. type of neuron that connects afferent and efferent neurons in the CNS
  10. 14. _____________: the rapid depolarization of a cell membrane
  11. 15. waxy substance that covers an axon and is responsible for increasing the rate of impulse transmission
  12. 16. the division of the PNS that sends an impulse to an effector (muscle/gland)
  13. 24. synaptic _________: the physical space between two neurons