OCR A Module 5 Communication Homeostasis and Energy - Part 1

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Across
  1. 2. formed by the link reaction
  2. 3. hormone released from pancreatic alpha-cells
  3. 4. involuntary muscle contractions to increase body temperature
  4. 8. feedback that reverses a change from set point
  5. 10. reduced cofactor produced by the Krebs cycle
  6. 11. any change in the environment
  7. 13. specialised cell that transmits electrical impulses
  8. 14. using a proton gradient to make ATP
  9. 16. e.g. a muscle or gland - carries out a response
  10. 19. gap between two neurons
  11. 20. ATP = Adenosine tri_____________
  12. 21. what happens to arterioles to help lose heat
  13. 22. islets which release insulin
  14. 24. neuron that transmits impulses from receptors to CNS
  15. 25. breakdown of glucose to produce pyruvate
  16. 28. chemical messenger released by endocrine glands
  17. 29. movement of these causes protons to be pumped across the membrane
  18. 30. cell or protein that detects a specific stimulus
Down
  1. 1. caused by opening of voltage-gated sodium channels
  2. 5. organism that relies on external heat sources to maintain body temperature
  3. 6. caused by opening of voltage-gated potassium channels
  4. 7. this part of the adrenal gland secretes adrenaline
  5. 9. organ system that uses hormones
  6. 12. forms insulating layer around the axon
  7. 15. maintenance of a stable internal environment within narrow limits despite external changes
  8. 17. around -70mV
  9. 18. chemical released from pre-synaptic vesicles
  10. 23. conduction of the nerve impulse from node to node
  11. 26. caused by postsynaptic sodium channels opening
  12. 27. neuron that transmits impulses from CNS to effectors