Across
- 6. branches that receive incoming signals
- 11. carries from PNS to CNS
- 12. aka internal receptors
- 17. division in PNS that provides control over skeletal muscle contraction
- 18. have two processes with the cell body between them
- 19. provides automatic involuntary regulation in PNS
- 20. monitor the position and movement of skeletal muscles and joints
- 22. division motor commands from CNS to PNS
- 23. cite where neuron communicates with another cell
- 24. line the central canal and the chambers of the brain
- 25. all neural tissue outside CNS
Down
- 1. containing brain and spinal cord
- 2. innervate skeletal muscles
- 3. phagocytic cells derived from white blood cells that migrated to the CNS as the nervous system formed
- 4. innervate cardiac and smooth muscle, glands, and adipose tissue
- 5. wrap around axons, creating a membranous sheath of insulation made of myelin
- 7. aka association neurons; are located entirely within the brain and spinal cord
- 8. provide info about the external environment
- 9. dendrites and axon are continuous, and cell body lies off to one side
- 10. the basic units of the nervous system
- 11. part of the neuron that carries outgoing signals forward
- 13. secrete chemicals vital to maintenance of blood-brain barrier
- 14. end of axon where neuron communicates with another cell
- 15. two or more dendrites and a single axon
- 16. clusters of rough ER and free ribosomes
- 21. regulate the environment around the neurons, provide a supporting framework for neural tissue, act as phagocytes