Across
- 6. filled with fluid and lined with tiny hair cells
- 7. dependence on a substance
- 14. gap between one neuron's axon and another neuron's dendrite
- 15. the creation of a new action potential
- 16. slow down the central nervous sysytem
- 17. cells that help you gather information about your environment.
- 18. carries the nerve impulse from the cell body to other neurons and muscles.
- 20. provide information about color to the brain
Down
- 1. light sensitive cells
- 2. relays signals
- 3. ability to survive factors
- 4. behind the iris
- 5. increase alertness and physical activity
- 8. numerous receptor cells called rods and cones
- 9. regulates body temperature
- 10. neurotransmitter found in the brain
- 11. the largest part of the brain
- 12. stimulus needed to produce a nerve impulse.
- 13. receive signals from other neurons
- 19. gap in the myelin sheath