Across
- 3. muscles or glands that respond to impulses
- 6. an insulating phospholipid layer that surrounds the axons of neurons
- 8. long nerve fiber that conducts away from the cell body of the neuron
- 9. message that travels from the dendrites of a neuron to the axon
- 11. receives information about changes in the environment
- 12. the folded outer surface of the cerebrum
- 14. A tiny gap where two neurons meet
- 15. Cells that support, insulate, and protect neurons
- 17. links brain to rest of body
- 19. serves the internal organs of the body
- 20. A bundle of neurons
Down
- 1. the extensions of a neuron that receives messages and conducts impulses toward the cell
- 2. the brain stem
- 4. involuntary response to a stimulus
- 5. Process by which ATP is used to move sodium ions out of the cell and potassium ions back into the cell
- 7. helps control muscle coordination and balance
- 10. brain, spinal cord, and network of nerves throughout your body.
- 13. natural neurotransmitters linked to pain control
- 16. the command center of the body.
- 18. the largest part of the brain