Plant and Nervous responses

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Across
  1. 3. response the way our bodies respond to the environment. Consists of a stimulus, receptor and effector
  2. 4. the chemical signal that is passed across a synapse
  3. 8. growth substance/plant hormone chemicals that influence the growth and development of plants
  4. 9. fatty coat that surrounds axons; increases speed to nerve impulse and insulates axon
  5. 10. neurone that transmits impulses from a relay neurone to an effector such as muscles or glands
  6. 12. the way that information is passed along nerve cells
  7. 14. tropism the growth response of a plant towards a directional stimulus
  8. 17. part of the peripheral nervous system that is voluntary
  9. 18. the junction between two neurones, or between a neurone and muscle cells
  10. 19. the gap between to neurones
  11. 22. feedback loop a self-regulating system. When a condition is too high it is brought down to the optimum. When it is too low it is brought up to the optimum.
  12. 24. neurone that transmits impulses from receptors to a relay neurone in the CNS
  13. 25. part of the peripheral nervous system that is involuntary
  14. 26. what the effector causes to happen
  15. 27. a change in the environment that causes a coordinated response to occur
  16. 28. receives impulses from receptors or axon nerve endings of other neurones
  17. 29. the organ with the highest density of nerve cells and the centre of the nervous system
  18. 31. response/ phototropism growth of a plant in response to light
Down
  1. 1. the part of our body that causes a response to a stimulus
  2. 2. tropism the growth response of a plant away from a directional stimulus
  3. 3. the brain and spinal cord
  4. 5. protective sheath that covers the first leaves of a seedling
  5. 6. cord a dense area of nerve cells that is inside of our spine
  6. 7. all the nerves of the nervous system except the brain and spinal cord
  7. 11. the nerve pathway of a reflex action
  8. 13. neurone in the CNS, connects the sensory and relay neurone
  9. 15. the maintenance of a constant internal environment
  10. 16. response/geotropism growth of a plant in response to gravity
  11. 20. the plant hormone that causes plants to grow towards light
  12. 21. a rapid, automatic, involuntary response to a stimulus
  13. 23. the part of our body that detects a stimulus
  14. 30. transmits nerve impulses over large distances