3.3.4 Human Digestive System 2

Follow-Me – iQuiz

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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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for the Next Question

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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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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

CONGRATULATIONS

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for the Next Question

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

CONGRATULATIONS

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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

CONGRATULATIONS

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for the Next Question

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

CONGRATULATIONS

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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

CONGRATULATIONS

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