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Digestive System

Junior Science

Food enters the digestive system in the mouth, what happens to food here The teeth grind and chew it into smaller pieces
What happens to starchy foods in the mouth The enzyme amylase breaks it down
What do you call the tube that carries the food to the stomach by muscular action Oesophagus
After the stomach what is the name of the tube the broken down food enters Small intestine
What happens to the food molecules in the small intestine They are absorbed into the bloodstream
What is the name of the tube after the small intestine Large intestine
What happens in the large intestine Water is passed back into the blood, leaving solid waste
What is the function of the liver Produces bile which helps break down fats
What is the function of the pancreas Produces digestive enzymes
What is the name of the passage where wastes leave the body Anus
What are the 5 stages of nutrition Ingestion, Digestion, Absorption, Assimilation and Egestion
What is ingestion Taking food into mouth
What is digestion Breaking down of food into small molecules
What is absorption The passing of digested food molecules into the blood from the small intestine
What is assimilation The body cells take in food molecules from the blood
What is Egestion Undigestedfood is passed out if the body
What are the two types of digestion Physical and chemical
What is meant by physical digestion Where food is chewed into smaller bits
What is meant by chemical digestion Where food is broken down further by chemicals (enzymes)
Name the four types of teeth Incisors, Canines, Premolars and Molars
Describe shape and function of incisors Sharp teeth at front for cutting food
Describe shape and function of canines Pointed teeth for tearing food
Describe shape and function of premolars Flat teeth for grinding food
Describe shape and function of molars Large, flat teeth at back for grinding
What do you call a chemical that can speed up a chemical reaction, without itself being changed An enzyme
Where are enzymes made In living cells
What do you call the substance that the enzyme works on Substrate
What do you call the substance that the substrate is broken down to Product
What do you call the enzyme in the saliva Amylase
What does the enzyme amylase do It breaks starch down to maltose
What does the enzyme Maltese do It breaks maltose down to glucose
Why is it important that food is eventually broken down to glucose Molecules are small enough to be absorbed through small intestine into blood
To show the action of amylase on starch, you need a test tube with starch solution and another with starch and amylase, what is amylase added To show that amylase breaks down starch
What happens when iodine is added to the starch solution Turns blue black
What happens when iodine is added to the starch solution with the amylase present NO colour change
Why Has no colour change happened in test tube-containing starch and amylase The starch is broken down by the amylase
Where would you get amylase for experiment From saliva
Created by: Teacher Amrein