Biology B2 3.3 Enzymes in digestion.

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What makes digestive enzymes?
Digestive enzymes are made by glands in the digestive system.
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Where do digestive enzymes work?
Outside the body cells in the cavity of the digestive system.
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What digests each particular food type?
Specific enzymes.
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How are digestive enzymes produced?
By specialised cells in glands and in the lining of the gut, the enzymes pass out of the cells and come into contact with the food.
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What does digestion involve?
Digestion involves the breakdown of large, insoluble molecules into smaller soluble molecules.
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What is each reaction in digestion controlled by?
A specific enzyme.
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What enzyme catalyses the digestion of starch into sugars in the mouth and small intestines?
Amylase (a carbohydrase). It is produced by the salivary glands, the pancreas and the small intestine.
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What enzyme catalyses the breakdown of proteins into amino acids in the stomach and small intestine?
Protease. It is produced by the stomach, the pancreas and the small intestine.
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What enzyme catalyses the breakdown of lipids (fats and oils) to fatty acids and glycerol?
Lipase. It is produced by the pancreas and small intestine.
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What does amylase do?
Catalyses the digestion of starch into sugars in the mouth and small intestine.
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What does protease do?
Catalyses the breakdown of proteins into amino acids in the stomach and small intestine.
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What does lipase do?
Catalyses the breakdown of lipids (fats and oils) to fatty acids and glycerol.
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Which enzyme digests starch?
Amylase.
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**MEMORISE THE THREE MAIN DIGESTIVE ENZYMES. LEARN THEIR SUBSTRATES AND THE PRODUCTS OF DIGESTION**
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Card 2

Front

Where do digestive enzymes work?

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Outside the body cells in the cavity of the digestive system.

Card 3

Front

What digests each particular food type?

Back

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Card 4

Front

How are digestive enzymes produced?

Back

Preview of the front of card 4

Card 5

Front

What does digestion involve?

Back

Preview of the front of card 5
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