Neural Signalling

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Across
  1. 1. part of a neuron containing cytoplasm and nucleus (4,4)
  2. 4. chemical messenger released at synapses (15)
  3. 10. neurotransmitter used as an example in synapses (14)
  4. 11. signal transmitted along neurons (10,7)
  5. 13. entry of calcium ions into presynaptic membrane after depolarization (7,6)
  6. 14. electrical charge difference across a neuron membrane at rest (7,9)
  7. 15. junction between neurons or between neuron and effector (7)
  8. 16. large diameter nerve fibre found in squid (5,4)
  9. 19. positively charged ions pumped out of neurons (6,4)
  10. 25. separation of charge across the plasma membrane (12)
  11. 26. molecule that provides energy for active transport (3)
  12. 28. target cell that responds to a neuron signal (8,4)
  13. 33. ions that enter presynaptic neuron during depolarization (7,4)
  14. 34. elongated projection that carries electrical signals (5,5)
  15. 35. short branched fibre that conducts impulses toward the cell body (9)
  16. 36. long single nerve fibre that conducts impulses away from the cell body (4)
  17. 37. jumping of impulses between nodes in myelinated axons (9,10)
Down
  1. 1. jelly like substance inside the neuron cell body (9)
  2. 2. process of transmitting an impulse along a fibre (10)
  3. 3. feature of typical chemical synapses (18)
  4. 5. depolarization of postsynaptic membrane after neurotransmitter binding (32)
  5. 6. return to resting potential after an action potential (15)
  6. 7. membrane that releases neurotransmitter (11,8)
  7. 8. rapid change in membrane potential during a nerve impulse (6,9)
  8. 9. movement of ions against their concentration gradient (6,9)
  9. 12. description of the resting potential inside a neuron (8,9)
  10. 15. membrane protein that uses ATP to move ions (19)
  11. 17. positively charged ions pumped into neurons (9,4)
  12. 18. voltage difference across a cell membrane (8,9)
  13. 20. factor that positively correlates with conduction speed (4,8)
  14. 21. gap between presynaptic and postsynaptic membranes (8,5)
  15. 22. nerve fibre with myelin sheath (10,5)
  16. 23. loss of membrane polarization during an action potential (14)
  17. 24. transmembrane protein that binds neurotransmitters (8)
  18. 27. cell in the nervous system that carries electrical impulses (6)
  19. 29. animal used to study fast nerve impulse transmission (5)
  20. 30. charged particles that move during action potentials (6,4)
  21. 31. organelle containing genetic material in a neuron (7)
  22. 32. insulating layer that increases speed of nerve impulses (6)