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Digestive system

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  • Where does most digestion and absorption of nutrients occur?
    Large intestine
    Esophagus
    Small intestine
  • What colour does iodine solution turn if starch is present?
    Green
    Brown
    Blue-black
  • Which food contains a lot of vitamins?
    Cake
    Butter
    Orange
  • Which part of the digestive system carries food from the mouth to the stomach?
    Esophagus
    Large intestine
    Small intestine
  • Why is water important in a balanced diet?
    It provides protein
    It digests fat
    It helps transport nutrients and remove waste
  • Which food group mainly provides energy?
    Fruits
    Carbohydrates
    Vegetables
  • Why does iodine not turn blue-black after starch is mixed with saliva for some time?
    Iodine becomes weak
    Water removes starch
    Saliva breaks down the starch
  • What is the final stage of digestion where undigested food leaves the body?
    Digestion
    Egestion
    Absorption
  • Which food is rich in protein?
    Fish
    Apple
    Bread
  • Which organ churns and mixes food with digestive juices?
    Stomach
    Large intestine
    Mouth
  • Which chemical is used to test for the presence of starch?
    Benedict’s solution
    Limewater
    Iodine solution
  • What colour remains if iodine solution is added to food with no starch?
    Brown
    Red
    Blue-black
  • Which nutrient helps protect the body from diseases?
    Carbohydrates
    Fats
    Vitamins
  • Which organ produces digestive enzymes and releases them into the small intestine?
    Esophagus
    Liver
    Pancreas
  • What is the function of the large intestine?
    Absorb water from undigested food
    Produce saliva
    Chew food
  • What happens when starch is mixed with saliva and left for some time?
    Starch increases
    Starch breaks down into sugar
    Starch becomes fat
  • Which nutrient helps keep the digestive system healthy by preventing constipation?
    Fat
    Protein
    Dietary fibre
  • What is a balanced diet?
    A diet with only protein foods
    A diet with only vegetables
    A diet containing all nutrients in the correct amounts
  • What is the main function of teeth in digestion?
    Absorb nutrients
    Break food into smaller pieces
    Produce enzymes
  • Which organ produces saliva?
    Salivary glands
    Pancreas
    Liver
  • Which enzyme in saliva helps digest starch?
    Protease
    Lipase
    Amylase
  • What liquid in the mouth helps start digestion?
    Gastric juice
    Bile
    Saliva
  • Which food is rich in carbohydrates?
    Chicken
    Egg
    Rice
  • Which nutrient helps to repair and build body tissues?
    Vitamins
    Proteins
    Carbohydrates
  • What happens to food in the mouth besides chewing?
    It mixes with saliva and begins digestion
    It turns into blood
    It becomes bile
  • Which organ is responsible for breaking food into smaller pieces by chewing?
    Small intestine
    Stomach
    Mouth
  • Which part of the digestive system absorbs digested nutrients into the blood?
    Large intestine
    Stomach
    Small intestine
  • Which organ stores bile before releasing it into the small intestine?
    Pancreas
    Gallbladder
    Stomach
  • Which organ produces bile to help digest fats?
    Stomach
    Pancreas
    Liver
  • Which nutrient is the main source of energy for the body?
    Carbohydrates
    Proteins
    Fats
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