Nervous Tissue

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Across
  1. 2. Nervous tissue also includes cells that do not________impulses, but instead support the activities of the neurons.
  2. 5. The Schwann cells are underlain by the_______sheath.
  3. 9. The axons are responsible for transmitting impulses over_______distances from cell body.
  4. 11. It stimulates________contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.
  5. 14. integration and________are the two major functions of nervous tissue.
  6. 15. Supporting, or glia, cells bind neurons together and_______the neurons.
  7. 17. In the peripheral nervous system, Schwann cells are neuroglia cells that_______neuronal function by increasing the speed of impulse propagation.
  8. 18. _______are supporting cells that provide physical sport, remove debris, and provide electrical insulation.
  9. 20. Nervous tissue responsible for coordinating and________many body activities.
  10. 21. When a neuron is sufficiently stimulated, it generates an action________that propagates down the axon towards the synapse.
  11. 23. _______are highly specialized nerve cells that generate and conduct nerve impulses.
  12. 25. The cell body is like a_______for the neuron.
Down
  1. 1. The axon is surrounded by a whitish, fatty layer called the_______sheath.
  2. 3. If enough neurotransmitters are released at the synapse to_________the next neuron.
  3. 4. The signal is transmitted across the synapse by chemical compounds known as_________.
  4. 6. Unipolar neurons have only a single process_________out from the cell body.
  5. 7. The medullary sheath is interrupted at intervals by the_______of Ranvier.
  6. 8. irritability and conductivity are their two major________characteristics.
  7. 10. The main part of the cell, the part that carries on the_________functions, is the cell body.
  8. 12. The________is the gap between nerve cells, or between a nerve cell and its target.
  9. 13. Neurons categorized as________neurons have several dendrites and a single prominent axon.
  10. 14. Dendrites are extensions, or processes, of the_________that carry impulses to the cell body.
  11. 16. Outside the myelin sheath there is a cellular layer called the________.
  12. 17. There are_______types of neuroglia.
  13. 19. A typical neuron displays a distinctive_________.
  14. 22. A typical neuron consists of dendrites, the cell body, and an_______.
  15. 24. Dendrites are responsible for responding to_______.
  16. 26. nervous tissue contains_______categories of cells.