Across
- 2. - A cell with an internal negative charge surrounded by the positive charge
- 6. - When the voltage of the membrane drops below its resting potential
- 9. -the energy that enables things to move
- 11. - Converts electrical signals and relays them to another neuron
- 12. - The time in which the axon is unable to respond to further stimuli
Down
- 1. - Electric potential difference
- 3. node -the natural pacemaker that keeps a resting heart rate
- 4. - Insulates the axon
- 5. - Surrounds a nerve cell at its resting potential
- 7. - Part of the neuron that carries electrical impulses
- 8. - A nerve cell
- 9. drinks -cause your heart rate to increase
- 10. -a muscle that contracts to deliver nutrients around the body