A2 IAL Biology Vocabulary - Topic 8

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Across
  1. 3. brain imaging technique that detects differences between oxy- and deoxy-haemoglobin
  2. 4. long cytoplasmic extension of nerve cells
  3. 9. neurotransmitter used at the neuromuscular junction
  4. 12. this is the period when a second action potential cannot be generated
  5. 14. light-sensitive pigmnet in rod cells
  6. 15. brain region responsible for conscious thought, control of movement and sensory processing etc etc
  7. 19. non-protein component of the pigment in rod cells
  8. 21. gap formed between Schwann cells
  9. 22. blocks voltage-gated sodium channels
  10. 24. brain region that contains control centres for e.g. control of breathing and heart rates
  11. 25. nerve conduction along myelinated nerve cells
  12. 26. splitting of the light-sensitive pigment in rod cells, caused by light
  13. 27. -70mV
  14. 29. CNS = brain and ...
Down
  1. 1. when this is reached an action potential is generated
  2. 2. detects a stimulus
  3. 4. plant hormone causing phototropic responses
  4. 5. light-sensitive plant pigment
  5. 6. caused by potassium channels being slower to close
  6. 7. +45mV
  7. 8. nerve cell
  8. 10. type of nerve cell that connects to an effector
  9. 11. gap between nerve cells
  10. 13. ion required for neurotransmitter release
  11. 16. precursor to dopamine, used to treat Parkinson's disease
  12. 17. essential for transmission of a nerve impulse across a synapse
  13. 18. neurotranmitter lacking in Parkinson's disease
  14. 20. plant hormone involved in seed germination
  15. 23. decrease in the response to a repeated harmless stimulus
  16. 28. ion whose movement causes depolarisation