NERVOUS TISSUE

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