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