Across
- 2. Brain and spinal cord
- 5. Proteins that receive signals
- 6. Support cells of the nervous system
- 8. Nerve cell that transmits signals
- 9. Movement from high to low concentration
- 15. Junction between two neurons
- 16. Chemical messengers between neurons
- 18. Neurotransmitter linked to reward and movement
- 21. function Control of muscle movement
- 22. Neurotransmitter for muscle activation
- 24. Myelinated nerve fibers in CNS
- 26. Connect neurons within the CNS
- 28. Carry signals from the CNS
- 29. Lacking a myelin sheath
- 30. Bundle of neurons
Down
- 1. Region where nerve impulses begin
- 3. Gap between neurons at a synapse
- 4. Branches that receive signals
- 7. Carry signals to the CNS
- 10. Neurotransmitter involved in alertness and inflammation
- 11. Neuron cell bodies in CNS
- 12. Nerves outside brain and spinal cord
- 13. Neurotransmitter affecting mood and sleep
- 14. Inhibitory neurotransmitter in CNS
- 17. Cells that form myelin in the PNS
- 19. Long fiber that carries impulses away from cell body
- 20. Main part of a neuron with nucleus
- 23. Covered with insulating myelin sheath
- 25. Star-shaped support cells in the CNS
- 26. Protein pathways for ions across membrane
- 27. Hormone for “fight or flight” response