Review Chapter 6-7 IGCSE Biology

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Across
  1. 2. The type of teeth used for grinding and crushing food.
  2. 4. What is the taking of substances, e.g., food and drink, into the body?
  3. 7. These structures help regulate the opening and closing of stomata.
  4. 8. The small intestine is lined with tiny projections called ____________, which further increase the surface area.
  5. 11. The function of this substance in gastric juice includes killing harmful microorganisms in food.
  6. 12. The by-product from photosynthesis.
  7. 14. The green pigment found in chloroplasts that plays a crucial role in photosynthesis.
  8. 17. This enzyme in the digestive system is responsible for breaking down proteins in the acid conditions.
  9. 18. This type of teeth is used for tearing and shredding food.
  10. 20. The structure in the small intestine responsible for the absorption of nutrients into the bloodstream.
  11. 21. The function of the gall bladder is to store and release ____________ to aid in the digestion of fats and oils.
  12. 22. The type of digestion that involves breaking down food into smaller pieces without a chemical change to the food molecules.
  13. 23. The function of this enzyme in the digestive system is to break down starch into maltose.
  14. 25. This is the process by which plants synthesize carbohydrates from raw materials using energy from light.
  15. 26. Something present in the environment in such short supply that it restricts life processes.
  16. 28. This ions are necessary for the synthesis of the green pigment.
  17. 30. The type of teeth used for biting and cutting food.
  18. 31. The product from photosynthesis.
  19. 32. This vitamin is important for calcium absorption and is produced by the skin when exposed to sunlight.
  20. 36. The component that regulates gas exchange in leaves, found on the leaf surface.
  21. 37. The role of lacteals in villi is to absorb these nutrients.
  22. 38. The region in the digestive system where most nutrients are absorbed.
  23. 39. Carbohydrates made in photosynthesis can be stored as this for future energy use.
  24. 40. An alkaline mixture that neutralizes the acidic mixture of food and gastric juices in the small intestine.
  25. 41. The process by which glucose is used in cells to provide energy.
Down
  1. 1. A substance used to indicate the presence of carbon dioxide and its effect on the rate of photosynthesis.
  2. 3. The primary function of the cuticle on a leaf.
  3. 5. These are the organelles in the leaf where photosynthesis primarily takes place.
  4. 6. The region of the digestive system where water is mainly absorbed.
  5. 9. Something that transport water and nutrients.
  6. 10. Amylase is secreted in the ____________ and acts on physical digestion in the digestive system.
  7. 13. The type of sugar produced in photosynthesis that is used for energy in cells.
  8. 14. The breakdown of large insoluble molecules into small soluble molecules.
  9. 15. The outermost layer of a leaf that acts as a protective barrier.
  10. 16. These break down fats and oils into fatty acids and glycerol.
  11. 19. The removal of undigested food from the body as faeces.
  12. 24. These increase the surface area of the small intestine for the absorption of nutrients.
  13. 25. These break down proteins into amino acids in the digestive system.
  14. 27. The layer of cells beneath the upper epidermis in a leaf that contains chloroplasts.
  15. 29. Air-filled spaces in the leaf that aid in gas exchange during photosynthesis.
  16. 33. These ions are essential for making amino acids.
  17. 34. Scurvy is caused by a deficiency of this vitamin.
  18. 35. The organ that produces amylase, trypsin, and lipase, which act in the digestive system.
  19. 38. This sugar is used for transport in the phloem and attracting insects for pollination.