Across
- 2. decreases availability of a neurotransmitter
- 6. chemical messengers that are secreted into the bloodstream
- 8. contains the brain and spinal cord
- 9. insulates axon and speeds neural impulses
- 10. increases availability of a neurotransmitter
- 13. these neurons help with movement; efferent neurons
- 15. contains autonomic and somatic nervous systems
- 17. afferent neurons
- 18. part of the central nervous system, also a part of the spine
- 19. base building block of the nervous system
- 20. regulates key involuntary functions of the body
Down
- 1. neurons that send signals towards the central nervous system
- 3. chemical messenger that carries messages between neurons
- 4. system that chemically controls various functions of cells, tissues, and organs
- 5. division of the peripheral nervous system that controls the skeletal system
- 7. cell body
- 11. neurons that send signals away from the central nervous system
- 12. these make up the endocrine system; they produce and secrete hormones
- 14. the study of the brain
- 16. neurons that connect within the central nervous system