Across
- 2. a procedure that stops action potentials from transmitting, usually for the purpose of stopping pain sensation
- 4. an organ made up of a bundle of neurons wrapped in connective tissue
- 5. the collective name for the three layers of tissue that cover and protect the brain and spinal cord
- 8. the cells that serve to support neurons
- 9. if you need your brain checked for a disorder, a doctor who specializes in this science is who you want to see
- 11. slowness in responding to a stimulus
- 13. the portion of a nerve that carries action potentials away from the cell body
- 14. the part of a neuron that collect messages into the cell body
- 16. a cell that transmits messages, called action potentials, in the form of electrical currents
- 19. a state of confusion and disorientation
- 20. a level just high enough to activate a neuron
- 21. a quick, automatic action triggered by a sensory input
Down
- 1. the location where one neuron communicates to another
- 3. the part of a neuron containing the nucleus and other organelles that are also present in other cell types
- 6. a chemical used to communicate from neuron to neuron
- 7. the covering around some neurons that makes action potentials travel faster
- 10. the tissue makeing up the outer layer of a nerve
- 12. an area of skin supplied by one spinal nerve
- 15. the types of neurons that carry messages to muscles, organs and glands from the central nervous system
- 17. a networking arrangement of nerves
- 18. the type of neuron that carries action potentials from your skin or organs toward your brain and spinal cord