1. 3.3.4 Human Digestive System 2 Follow-Me – iQuiz

2. Q. Name a structure in the human digestive system, other than teeth, which is involved in mechanical digestion. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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4. Q. Describe two functions of bile in relation to digestion. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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6. Q. Where is lipase secreted? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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8. Q. What are symbiotic bacteria? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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10. Q. Name the part of the digestive system in which the products of digestion absorbed into the blood. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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12. Q. Explain how the ileum (small intestine) is adapted for the absorption of the products of digestion. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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14. Q. What is meant by the term digestion? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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16. Q. Where in the human body is the liver located in relation to the stomach? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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18. Q. Name a process involved in the passage of the products of digestion into the blood. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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20. Q. A person who has suffered from constipation may be advised to increase the amount of wholegrain cereal in her/his diet. Why? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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22. Q. Why is digestion necessary? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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24. Q. From what organ does the bile duct leave? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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26. Q. From which part of the alimentary canal does food arrive into the duodenum? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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28. Q. Name the part of the digestive system in which water is absorbed into the blood. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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30. Q. Where does lipase act? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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32. Q. Give two activities of symbiotic bacteria in the human digestive system. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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34. Q. State one digestive function of the pancreas. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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36. Q. What process results from the contraction of the muscles in the small intestine? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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38. Q. Indicate which of the following most accurately represents the pH of the contents of the small intestine. Acidic. Neutral. Alkaline. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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40. Q. Name two glands that pass their secretions into the small intestine. 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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42. Q. What is the approximate pH of the site of action of lipase? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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44. Q. Proteins are digested to simpler substances. What are these simpler substances called? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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46. Q. In which organ is food churned into chyme? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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48. Q. Which teeth grind food into smaller pieces? 5 – 7 Adds fibre, fibre absorbs water, peristalsis encouraged, faster digestive transit Breakdown of food Bacteria that live in or on another organism involving benefit Amino acids Duodenum; Small intestine Digestion; Production of vitamins; Benefit immune system Diffusion; Passive transport Colon Gall bladder Large surface area; Good blood and lymph supply; Lining one cell thick; Long; Villi Pancreas; Duodenum Pancreas; Liver Peristalsis Emulsification; Raises pH; Makes alkaline Tongue; Oesophagus; Stomach; Small intestine Solubility; Absorption; Transport Produces enzymes; Neutralises chyme Stomach 7 – 9 Ileum; Villi Above and to the right Molars Alkaline

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