Across
- 2. conduct impulses to the spinal cord
- 4. supplies motor impulses to the neck muscles
- 6. any change that returns the membrane potential closer to its resting value
- 8. includes the brain and spinal cord
- 11. the outermost layer of the schwann cell
- 12. neuron fibers that conduct impulse to the cell body
- 13. carry impulses from the cns to muscles and glands
- 15. axons are covered by this white-ish,fatty substance
- 16. any tissue or organ that carries out a nervous system command
- 17. form the myelin sheath of cns neurons
- 18. sends numerous branches to the shoulder,arm,forearm,wrist,and hand.
- 19. any collection of nerve cell bodies located outside the cns
- 20. star-shaped cells serving many functions.
Down
- 1. act has phagocytes to remove pathogens,impurities,and dead neurons
- 3. make up of all the nerves outside of the CNS
- 5. the point of junction for transmitting the nerve impulse
- 7. when the membrane falls below its resting value
- 9. support cells
- 10. line ventricles in the brain.
- 14. relay information from place to place within the cns