Nervous System Vocab

1234567891011121314151617181920
Across
  1. 2. neuron - nerve cell that carries impulses from an organ or receptor to the CNS
  2. 3. - fiber carrying impulses away from the cell body of a neuron
  3. 4. neuron - neuron “upstream” of the synapse
  4. 6. - connection between the end of a nerve cell and another cell. A tiny gap traversed by neurotransmitters.
  5. 8. potential - difference in electrical potential across a nerve cell membrane at rest ~ -70 mV
  6. 9. cells - cells that form the myelin sheath
  7. 10. - cell within the nervous systems that carries electrical impulses
  8. 13. - a cell specialized to respond to the stimulation of an action potential
  9. 14. neuron - neuron “downstream” of the synapse
  10. 16. nervous system (PNS) - nerves that convert sensory information to the CNS and impulses to muscles and glands
  11. 18. - fine fibrous structure on a neuron that receives impulses
  12. 19. polarization - when a lipid membrane has a positive potential on one side and a negative potential on the other side
  13. 20. - a neurotransmitter that functions in both the CNS and PNS
Down
  1. 1. - chemical released across the synaptic cleft that transmits the action potential
  2. 3. potential - reversing the membrane potential from -70 mV to +40 mV
  3. 5. potential - difference in potential across a neuron membrane
  4. 7. nervous system (CNS) - brain and spinal cord of vertebrates
  5. 11. of Ravier - gap in myelin sheath
  6. 12. neuron - relays electrical impulses from a sensory neuron to a motor neuron (in the CNS)
  7. 15. - nerve bundle of many nerve fibers which connect the CNS with parts of the body
  8. 17. neuron - nerve cell that carries impulses away from the CNS
  9. 18. - fiber that carries impulses towards the cell body of a neuron
  10. 19. sheath - insulating sheath around axons