Topic 6.5

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Across
  1. 2. Connections which allow signals to be transmitted from neuron to neuron
  2. 3. A sac that contains the neurotransmitter
  3. 5. A chemical substance
  4. 6. A neurotransmitter
  5. 9. Sudden change in membrane potential (Negative to Positive) internal charge
  6. 10. Part of the neuron where neurotransmitters are synthesized and stored in vesicles
  7. 11. Element that diffuses out of the neuron during repolarization.
  8. 15. Opening of potassium channels, causing membrane potential to fall.
  9. 16. The firing of electrical impulses.
  10. 17. Neurons cannot be depolarised during this stage and Na+ channels are inactivated
  11. 18. Element that diffuses into the neuron during depolarization.
  12. 19. another name for a nerve cell, transmits signals in the form of electrical impulses
  13. 20. Gap between the adjacent Schwann cells.
Down
  1. 1. Insulating layer that speeds up the transmission of a nerve impulse
  2. 4. Membrane potential when the neuron is not conducting an impulse.
  3. 7. Where the cell body is
  4. 8. An enzyme that breaks down acetylcholine into acetate and choline
  5. 12. Membrane potential needed for action potential to occur.
  6. 13. When nerve signals jump from one node of ranvier to another
  7. 14. Method used to release neurotransmitters