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Teeth increase surface area of food and saliva mixes with food for ease of swallowing Mouth
Type of enzyme found in saliva Carbohydrase (amylase)
Tube that carries food from mouth to stomach Oesophagus
Muscular movements that push food along oesophagus Peristalsis
Muscular bag that mixes food with acid and enzymes Stomach
Role of stomach acid Kill bacteria, provide optimum pH for stomach enzymes
Type of enzymes working in the stomach Protease
Firstly competes digestion, then absorption of food molecules into the blood Small intestine
Types of enzymes found in the small intestine Protease, carbohydrase and lipase
Structures found on Wall of small intestine to increase surface area Villi
Produces bile Liver
Stores bile Gall bladder
Carries bile from gall bladder to small intestine Bile duct
Role of bile Emulsify fats and neutralise stomach acid
Describe & explain what happens when fats are emulsified by bile Large droplets of fat are broken down into smaller droplets to increase surface area for lipase enzymes
Absorbs water into the blood Large intestine
Allows faeces to leave the body Anus
Breaking down large, insoluble molecules into small, soluble ones Digestion
Movement of small food molecules into the blood stream Absorption
Removal of wastes from the body Excretion
Enzyme that breaks down carbohydrates Carbohydrase
Building blocks of carbohydrates Glucose
Enzymes that break down fats Lipase
Building blocks of fats Glycerol and fatty acids
Enzymes that break down proteins Protease
Building blocks of protein Amino acids
Chemical used to test for starch Iodine
Colour change test for starch Orange > blue/black
Chemical used to test for glucose Benedicts (heat strongly)
Color change for benedicts test Blue > brick red
Chemical used to test for protein Biuret
Colour change for biuret test Blue > purple/lilac
Role of amino acids in the body Growth and repair
Role of glucose in the body Energy released during respiration
Role of fats in the body Store of energy, protect organs, insulation
Created by: MissRParry