nervous system

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Across
  1. 4. the light sensitive part of the eye that contains light receptors
  2. 11. these are detected to give us a sense of smell and taste
  3. 12. one part of the CNS
  4. 13. the abbreviation for the central nervous system
  5. 14. the neurones that carry information away form the CNS to effectors
  6. 16. the specialised cells that carry electrical impulses around our body
  7. 17. specialised cells that detect a change in the environment
  8. 18. how muscles respond when stimulated
  9. 20. a term for a change in an environment
  10. 21. this is released at a synapse
Down
  1. 1. how a chemical transmitter crosses the synapse
  2. 2. the main purpose of reflex actions
  3. 3. a collective term for muscles and glands that enable responses
  4. 5. the name for the gap between 2 neurones
  5. 6. a part of the CNS
  6. 7. this effector responds by contracting
  7. 8. the neurone that carries electrical impulses to the CNS
  8. 9. these are produced by glands
  9. 10. a key defining feature of reflex actions
  10. 15. impulses how information travels through the neurones of the nervous system
  11. 19. the neurones located in the CNS