Higher Human Biology Unit 3

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Across
  1. 2. neurotransmitter involved in reducing intensity of pain and other actions
  2. 4. cell in the nervous system that physically supports neurons and produces myelin sheaths
  3. 7. branch of the nervous system that controls the voluntary action of the skeletal muscle
  4. 8. neurotransmitter involved in inducing the feeling of pleasure and other actions
  5. 10. method of encouraging transfer of information to LTM by adding meaning
  6. 11. virus that attacks lymphocytes, often leading to AIDS
  7. 12. practice by repetition of an item of information
  8. 13. drug that blocks a receptor so a neurotransmitter can not bind
  9. 14. substance released by mast cells that causes the inflammatory response
  10. 17. triggers that aid the retrieval of information from LTM (10,4)
  11. 20. branch ofthe autonomic nervous system that prepare body systems for rest
  12. 22. method of encouraging transfer of information to LTM by adding structure
  13. 23. white blood cell with specific cell surface receptors; secretes antibodies into blood and lymph
  14. 25. neural pathway in which impulses from one neuron are passed to many
  15. 26. centre of conscious thought (8,6)
  16. 29. signal that affects a receptor and which can be passed on
Down
  1. 1. substance added to a vaccine to enhance the immune response
  2. 3. decrease in number of sensitivity of synaptic receptors as a result of exposure to drugs
  3. 5. causes flus and has antigenic variation
  4. 6. loss of items from STM
  5. 9. process by which phagocytes engulf and digest foreign material
  6. 15. neural pathway in which impulses from many neurons are passed to one neuron
  7. 16. branch of the nervous system often called PNS
  8. 18. type of white blood cell that causes apoptosis in infected cells
  9. 19. study of the transmission of infectious disease
  10. 21. chemical neurotransmitter or a drug that mimics one
  11. 24. pathway that recycles impulses round the same route
  12. 25. neural fibre that conducts impulses towards the cell body
  13. 26. band of tissue in the brain that connects the two cerebral hemispheres (6,7)
  14. 27. protein found in the post-synaptic membrane that binds neurotransmitter
  15. 28. immune response to a normally harmless antigen
  16. 30. neural fibre that conducts impulses away from the cell body