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Across 4. The functional connection between the axon of a neuron and the dendrite or cell body of another neuron or the membrane of another cell type 6. The difference in electrical charge between the inside and outside of an undisturbed nerve cell membrane (2 Words) 7. Exposed to a stimulus that exceeds the membranes threshold (2 Words) 11. Chemicals that axons secrete on effectors or other neurons 12. The brain and spinal cord (4 Words) 13. Portion of nerve cell that includes a cytoplasmic mass and a nucleus and form which nerve fibers extend (2 Words) 17. Nerve cells 21. Neuron processes that bring sensory information to the CNS (3 Words) 24. Wind tightly around axons (2 Words) 26. Specialized structures associated with the peripheral ends of sensory neurons specific to detecting a particular sensation and triggering nerve impulses in response, which are transmitted to the central nervous system (2 Words) 27. Fatty layers formed from certain neuroglia that surround axons, providing insulation (2 Words)

Down 1. Carry impulses from the CNS to effectors (3 Words) 2. Part of the nervous systemoutside the central nervous system (4 Words) 3. Part of the nervous that controls the viscera (3 Words) 5. Periodic gap in the insulating sheath (myelin) on the axon (3 Words) 8. Motor pathways of the peripheral nervous system that lead to the skin and skeletal muscles (3 Words) 9. Neurons are depolarized sufficiently (2 Words) 10. A typeof neuroglial cell that connects neurons to blood vessels 14. A type of neuroglial cell that forms myelin 15. A nerve fiber (It conducts a nerve impulse away from the neuron cell body) 16. Neuroglial cells line the ventricles of the brain (2 Words) 18. Muscles or glands that effect changes in the body 19. Masses of neuron cell bodies usually outside the central nervous system 20. Fills spaces, produce myeling and provides structural framework 22. Process of a neuron that recevies input from outer neurons 23. Neuroglial cell that supports neurons and phagocytizes 25. A bundle of axons in the perpiheral nervous system