AQA Biology Paper 2

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Across
  1. 5. The process that releases energy from glucose
  2. 6. An enzyme that breaks down starch into sugars
  3. 9. An organ that produces digestive enzymes and hormones
  4. 12. A neurone that carries impulses from receptors to the central nervous system
  5. 13. A hormone that lowers blood glucose concentration
  6. 14. A muscle or gland that responds to a stimulus
  7. 17. A fatty layer that insulates neurones and speeds up impulses
  8. 18. A specialised cell that transmits electrical impulses
  9. 20. An enzyme that breaks down proteins into amino acids
  10. 23. A finger-like projection in the small intestine that increases surface area for absorption
  11. 24. A junction between two neurones where signals are transmitted by neurotransmitters
Down
  1. 1. A cell or organ that detects a stimulus
  2. 2. An enzyme that breaks down lipids into fatty acids and glycerol
  3. 3. A reaction to a stimulus
  4. 4. A substance that increases the rate of a reaction without being used up
  5. 7. The breakdown of large insoluble molecules into small soluble molecules
  6. 8. A hormone that increases blood glucose concentration
  7. 10. A long part of a neurone that carries electrical impulses away from the cell body
  8. 11. A protein that speeds up chemical reactions in living organisms
  9. 12. A change in the internal or external environment detected by receptors
  10. 15. The control of body temperature within narrow limits
  11. 16. The pathway followed by nerve impulses during a reflex action
  12. 19. The regulation of internal conditions to maintain a stable environment
  13. 21. A substance made by the liver that neutralises stomach acid and emulsifies fats
  14. 22. A chemical messenger carried in the blood to target organs