Enzymes and Digestion

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Give three examples of big molecules
Starch, molecules and fats
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Give four examples of small molecules
Sugars, amino acids, glycerol and fatty acids
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What do digestive enzymes do to big molecules?
They break them down into smaller molecules
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Why do digestive enzymes do this?
So that the molecules can pass easily through the walls of the digestive system
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What does amylase convert?
It converts starch into sugars
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What does protease convert?
It converts proteins into amino acids
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What does lipase convert?
It converts lipids into glycerol and fatty acids
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In which three places is amylase produced?
1. Salivary glands 2. Pancreas 3. Small intestine
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In which three places is protease produced?
1. Stomach 2. Pancreas 3. Small intestine
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In which two places is lipase produced?
1. Pancreas 2. Small intestine
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Where is bile produced?
Liver
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Where is bile stored?
Gall bladder
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Where is bile released into?
Small intestine
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Where does hydrochloric acid work?
Stomach
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What sort of pH is bile?
Alkaline
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What does bile do in the small intestine?
Neutralises the hydrochloric acid and makes conditions alkaline
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Why does bile do this in the small intestine?
So that the enzymes can work
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What does bile do to fats?
Emulsifies them
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How does bile make digestion faster?
It breaks fat into tiny droplets, so they have a much larger surface area for lipase to work on
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Where are enzymes in digestion produced?
In glands and in the gut lining
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What do the salivary glands produce?
Amylase in saliva
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What is another name for the gullet?
Oesophagus
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Which enzyme does the stomach produce?
Protease
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What is the first reason as to why the stomach produces hydrochloric acid?
To kill bacteria
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What is the second reason as to why the stomach produces hydrochloric acid?
To give the right pH for protease to work
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What pH is hydrochloric acid?
pH 2
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What is produced in the liver?
Bile
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What does the gall bladder store?
Bile
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Where is bile released into?
Small intestine
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What does the pancreas produce?
Amylase, protease and lipase
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Where are all three enzymes released into?
Small intestine
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What happens in the large intestine?
Excess water is absorbed from food
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What is stored in the rectum?
Faeces
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What does the small intestine produce?
Amylase, protease and lipase
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What also happens in the small intestine?
Digested food is absorbed out of the digestive system into the blood
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Other cards in this set

Card 2

Front

Give four examples of small molecules

Back

Sugars, amino acids, glycerol and fatty acids

Card 3

Front

What do digestive enzymes do to big molecules?

Back

Preview of the front of card 3

Card 4

Front

Why do digestive enzymes do this?

Back

Preview of the front of card 4

Card 5

Front

What does amylase convert?

Back

Preview of the front of card 5
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