Nervous system, neurons, and neurotransmission

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Across
  1. 2. How is communication between neurons done?
  2. 4. The division of the Peripheral Nervous System responsible for the internal environment
  3. 7. Insulates the axon from external influences
  4. 9. An electrical signal sent down the length of the axon
  5. 11. An inhibitory neurotransmitter
  6. 13. An excitatory neurotransmitter
  7. 14. Where the neurotransmitters are stored
  8. 15. The space between the presynaptic neuron and the postsynaptic neuron
  9. 18. How is communication within neurons done?
  10. 19. What do neurotransmitters do with receptor cells?
Down
  1. 1. The Nervous System responsible for 'rest and digest'
  2. 3. Part of the neuron which receives the nerve impulse from adjacent neurons
  3. 5. The division of the Peripheral Nervous System which transmits commands from the Central Nervous System
  4. 6. What destroys neurotransmitters?
  5. 8. Three types of neuron (in alphabetical order)
  6. 9. Part of the axon which sends signal to an adjacent cell
  7. 10. Where electrical signals pass along
  8. 12. Important part of the Central Nervous System
  9. 16. The neuron which initiates Neurotransmission
  10. 17. A condition caused by an imbalance between excitatory and inhibitory neurotransmitters