Unit 3 Vocab Practice

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Across
  1. 2. white substance of the CNS; the myelinated nerve fibers
  2. 4. hardened myelin sheath due to multiple sclerosis
  3. 8. supporting cell in PNS; act as protection, cushioning cells
  4. 9. rapid, periodical and involuntary response to stimuli
  5. 10. the gray area of the CNS; contains unmyelinated nerve fibers and nerve cell bodies
  6. 13. when damage to the left cerebral hemisphere causes a loss of an ability such as speech or understanding written or spoken language even though intellect is uncompromised
  7. 14. collection of spinal nerves at the inferior end of the vertebral canal
  8. 15. shallow grooves that separate gyri in the cerebral cortex/cerebral hemisphere
  9. 17. glia; processes wrap tightly around nerve fibers producing fatty insulating cover/myelin sheath
  10. 19. spider-like phagocytes that monitor the health of nearby neurons; dispose of debris, dead hair cells and bacteria
  11. 21. reflexes that stimulate the skeletal muscle
  12. 22. a neuron of the autonomic nervous system having its cell body in a ganglion and its axon extending to a visceral organ or tissue
  13. 24. the outermost and toughest of the meninges
  14. 26. bundles of nerve fibers (neuron processes) running through the PNS
  15. 28. membranes (3) that cover the brain and spinal cord
  16. 30. types of glia; abundant star-shaped cells; almost ½ of neural tissue; most abundant and versatile
  17. 32. gaps between Schwann Cells in the myelin sheath
  18. 33. supporting cell in PNS; form myelin sheaths around nerve fibers in PNS
Down
  1. 1. cell bodies in clusters in the CNS
  2. 3. that line the central cavities of the brain and spinal cord; cilia to circulate cerebrospinal fluid
  3. 5. "neuron husk"; the part of a Schwann Cell external to the myelin sheath that contains most of the cells cytoplasm under the plasma membrane
  4. 6. found in muscles and tendons; detect the amount of stretch or tension in skeletal muscles, their tendons and joints
  5. 7. "nerve glue"; supporting cells in the CNS; nonneuronal tissue of the CNS that perform supportive and other functions
  6. 11. bundles of nerve fibers (neuron processes) running through the CNS
  7. 12. regulate the activity of smooth muscles, heart and glands
  8. 16. singular ganglion; cell bodies found in collection outside the PNS
  9. 18. aka synapse; gap between axon terminal and next neuron
  10. 19. whitish, fatty material that covers most nerve fibers
  11. 20. fluid produced by the choroid plexus that fills the ventricles and surrounds the CNS; similar to blood plasma but has less protein more vitamin C and a different ion composition
  12. 23. elevated ridge of tissue on the surface of the cerebralhemisphere/cerebral cortex
  13. 25. a deep groove on cleft; the deepest depressions or inward folds on the brain that separate large regions of the brain
  14. 27. dendrite endings of the peripheral nerves specialized to respond to a particular type of stimuli
  15. 29. arc neural pathway for reflexes that involve both PNS and CNS
  16. 31. the branching end of an axon just before the synaptic cleft