193386
Flashcards by originalchild, updated more than 1 year ago
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Created by originalchild
over 7 years ago
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Description
| Question | Answer |
| the digestive system breaks down large insoluble molecules into ? | smaller molecules |
| what does the chemical breakdown of food depend on | digestive enzymes |
| name the 3 types of food molecules | carbs, proteins and fats |
| name some carbs ? | bread potatoes rice |
| what are carbs made of | h2o , c ,o2 |
| what is the simplest carb | sugar |
| how does sugar develop into starch | it is built up |
| name a complex carb | starch |
| what are digestive enzymes that break down carbs are called | carbohydrase |
| name another group of carbohydrases | amylase |
| what is amylases job | break down starch into sugar |
| when starch is broken down into sugar wheere can it be absorbed | small intestine |
| starch into sugar can be broken down in g_______ | glucose by other carbohydrates |
| where is amylase present and made and released | saliva and made in the pancreas and released into the small intestine |
| what enzyme breaks down proteins | protease |
| describe the process protease to amino acids | protease(enzymes) -->shorter chains -->amino acids |
| name a protease in the stomach | pepsin |
| what type of conditions does pepsin work best at | acidic |
| what is the ph of the acid produced in the stomach | ph 2-3 |
| what does the optimum of a ph mean | reached its limit everything will stay at a constant |
| why is ph 2-3 a good condition for pepsin | it can break down protein as fast a possible |
| is the small intestine an alkaline or antacid | alkaline |
| what is the small intestines best working condition | ph 8 |
| what enzymes digest fats | lipases |
| what is produced by lipase's | fatty acids and glycerol |
| what is formed by fats and oils trying to mix | globules |
| globules form? | watery digestive juices |
| what do large globules have ? | small surface areas to volume ratio |
| largue globules have small surface area to volume ratio meaning? | lipases can ony break fat molecules slowly |
| where is bile from | gall bladder |
| what forms an emulsion | bile breaks down the large globules into tiny droplets |
| bile e______ fat | emulsifies |
| what is good about having a large surface area | the smaller droplets allow the lipase break down the fat molecules rapidly |
| when is bile released | after a fatty meal |
| what makes faeces brown | BILE |
| what makes faeces brown | BILE |
| what word ending are usually enzyme | ase |
| name two jobs for bile | neutralises the acid from the stomach. produces a slightly alkaline environment |