Across
- 2. the system where neurons operate
- 6. nerve cells helps us muscles contract in this system
- 7. portion of a neuron that carries nerve impulses away from the cell body
- 8. units of the brain and nervous system
- 9. electrical signals that send in chemical reactions in our bodies
- 10. neurons help our bodies excrete waste in this system
- 11. allows fast electrical impulses to travel throughout the body
Down
- 1. when a neuron is resting and has no impulse to carry
- 3. ears, eyes, nose, tongues, skin
- 4. allows electrical impulses to transmit efficiently along the nerve cells
- 5. large electrical "spike" or "impulse"