LC biology
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the digestive role of the liver? | -makes bile which emulsifies fat.
-stores nutrients
-makes sodium hydrogen carbonate to neutralise acid
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| what is mechanical digestion? | This is the physical break down of food for eg: by teeth
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| What is chemical digestion? | The br4eakdown of food using enzymes
eg: amylase digests starch into maltose
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| What is meant by the term egestion? | This is the removal of unabsorbed material from the digestive system
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| What are incisors? | chisel shaped teeth with sharp edges for cutting, slicing or biting.
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| What is peristalsis? | It is a wave of muscular action that forces food through the intestines.
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| what is the main location where digestion takes place and why? | Duodenum as it makes a range of digestive enzymes.
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| what is the function of the colon? | -it reabsorbes water from the waste forming feaces
-symbiotic bacteria in colon make vitamins and digest cellulose
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| what are4 symbiotic bacteria? | bacteria that obtain food from humans and provide useful vitamins in return.
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| where is bile made and stored? | bile is made in the liver and stored in the gall bladder.
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| what are the functions of bile? | -imulsifies lipids which increases the surface area for enzyme digestion
-neutralises acid chyme from stomach
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| name 2 adaptations of the small intestine for absorbing food. | -it has many villi and microvilli
-it is very long
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Created by:
edyta
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