Nervous System Crossword Puzzle

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Across
  1. 2. General function of the nervous system is to control and ______ the body
  2. 4. Electrical difference across membrane
  3. 5. The trigger zone of a neuron
  4. 6. Neuron classification includes multipolar, bipolar, and ______
  5. 7. Jumping conduction in myelinated axons
  6. 8. Period when stronger stimulus is needed
  7. 10. Period when neuron cannot fire another action potential
  8. 11. Ion responsible for repolarization
  9. 14. CNS support cells that regulate environment
  10. 15. Excitatory postsynaptic potentials
  11. 16. Gaps in myelinated axons (nodes of ______)
  12. 17. Inhibitory postsynaptic potentials
  13. 22. The nervous system is divided into central and ______ systems
  14. 23. Ion responsible for depolarization
  15. 24. Nervous system including brain and spinal cord
  16. 26. Branch-like structures that receive signals
  17. 29. Channels that open in response to voltage changes
  18. 34. CNS cells that produce myelin
  19. 35. Neurotransmitter binding causes ______ potential
  20. 36. Adding signals together
  21. 37. Cells that support neurons
Down
  1. 1. Type of synapse communication using chemicals
  2. 3. Chemical messengers released from neurons
  3. 9. Receptors that act directly on ion channels
  4. 12. Membrane potential becoming more negative
  5. 13. Long projection that carries impulses away from the soma
  6. 14. Neurotransmitter involved in muscle contraction
  7. 18. Rapid change in membrane potential is called an ______ potential
  8. 19. Channels that open due to chemicals
  9. 20. All-or-none signal in neurons
  10. 21. Neurotransmitter associated with mood and sleep
  11. 25. Neurons classified by direction: sensory, motor, and ______
  12. 27. Receptors that act indirectly
  13. 28. End of neuron that releases neurotransmitters
  14. 30. Nervous system compared to ______ system
  15. 31. Drugs/toxins affect neuron ______
  16. 32. Junction between neurons
  17. 33. The part of the neuron that contains the nucleus