2. 1. Nerve 9. Replaced
2. Neurons 10. Schwann
3. Myelin 11. Electrochemical
4. Motor 12. Potassium
5. Lymph 13. Positive
6. Neurons 14. Proteins
7. Glial 15. Sodium
8. permanent 16. gates

4. 17. Impulse 25. Breathing
18. Touch 26. Reflex
19. Synapse 27. quick
20. Neurotransmitter
21. Fire
22. Novocain
23. Toxin
24. paralysis