A group of similar cells that work together to carry out a specific function.
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What is an organ?
A group of different tissues that work together to preform a certain function.
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What is an organ system?
A group of organs working together to perform a particular function.
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What is an enzyme?
A catalyst produced by living things.
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Why cant we use incresing the teperature in the body to speed up reactions?
It would speed up the useful and unwanted reaction. Theres also a limit to how far you can raise the temperature before its cells start getting damaged.
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What is a catalyst?
A substance which increases the speed of a reaction without being changed or used up in the reaction.
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Why do enzymes need to have the correct temperature?
If it gets too hot the bonds holding the enzymes together break, which changes the shape of the enzymes active site and the substrate wont fit anymore. The enzyme is said to be denatured.
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What is the optimum PH for enzymes?
It is often PH 7 W
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What is the formula for rate of reaction?
Rate=1000/time
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What do digestive enzymes break down?
Big molecules such as starch,proteins and fats.
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What do carbohydrases convert carbohydrates into?
Simple sugars.
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What is an example of a carbohydrase?
Amylase
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Where is amylase made?
The salivary glands, the pancreas and the small intestine.
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What do Proteases convert Proteins into?
Amino acids
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Where are Proteases made?
The stomach, the pancreas and the small intestine.
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What do lipases convert lipids into?
Glycerol and fatty acids.
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What does bile do?
Neutralises the stomach acid and emulsifies fats.
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Where is bile produced?
In the liver
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Where is bile stored?
In the gall bladder before it is released into the small intestine.
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Why does bile neutralise the stomach acid?
The stomach produces hydrochloric acid which makes the PH too acidic for enzymes to work properly.
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Why does bile emulsify fats?
It gives a much bigger surface area of fat for the enzymes lipease to work on.
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What does the Silivary glands produce?
Amylase in the saliva
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What does the stomach produce?
Produces Protease enzyme pepsin, it produces hydrochloric acid to kill bacteria and to give the right PH for the enzyme protease to work.
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What does the Liver produce?
Bile is produced which neutralises stomach acid and emulsifies fats.
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What does the Large intestine do as part of the digestive system?
Removes excess water from food.
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What does the pancreas produce?
Protease,amylase and lipase enzymes to complete digestion. Also where the digested food is absorbed out of the digestive system into the blood.
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What does the rectum do as part of the digestive system?
Where the faeces are stored.
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Other cards in this set
Card 2
Front
What is a tissue?
Back
A group of similar cells that work together to carry out a specific function.
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