The Nervous System
Across
- 8. the fatty material that insulates a neuron & helps deliver messages faster
- 10. also called terminal branches
- 13. outermost layer of the brain made up of gray matter
- 15. controls movement and coordination
- 16. transmits messages away from the cell body
- 20. part of the autonomic system; functions as an emergency system; rest and digest
- 22. controls body activities involuntarily
- 23. area of white matter that connects the 2 hemispheres
- 25. consists of brain & spinal cord; receives, interprets & gives instructions
Down
- 1. Consists of nerves that extend from the spinal cord & brain
- 2. regulates body temp., metabolism, pituitary gland, & pleasure
- 3. transmit messages toward the cell body
- 4. area between brain and spinal cord
- 5. part of the autonomic system; functions as an emergency system; fight or flight response
- 6. nerve cells that are activated by sensory input from the environment
- 7. nerve cells that transmit messages
- 9. controls the voluntary activities of the body
- 11. part of brainstem that links medulla oblongata and thalamus
- 12. chemicals released to transmit signals between neurons
- 14. transmit neural impulses from the spinal cord to skeletal and smooth muscles; control all our muscles movement
- 17. allows for communication between sensory and motor neurons; also known as interneuron
- 18. extension of the spinal cord; when cut it can cause death
- 19. above the brainstem, between the cerebral hemispheres
- 21. produces sensations of arousal or alertness
- 24. junction between two neurons