8A Quick Quiz
1 A food substance found in many foods is:
A carbohydrate. B chalk.
C energy. D carbon dioxide.
2 What is used to test a food for starch?
A iodine solution
C Benedict’s solution
D Fehling’s solution
3 One of the ways in which water is used by the body is as:
A a source of fibre.
B a source of energy.
C a solid.
D a solvent.
4 Fibre in your diet helps to stop:
A you lying.
1 You have a balanced diet when:
A the mass of all the food you eat in a day adds up to 100 kg.
B the mass of all the food you eat one day is equal to the mass you eat the next day.
C you eat a wide range of different foods to give your body all the things it needs.
D you only eat fish on Fridays.
2 Which of these people will need to eat the most food in a day?
A a 3-year-old child
B an 85-year-old woman
C a 35-year-old man, who works outside cutting down trees
D a 25-year-old woman, who works in an office using a word processor
3 Meats are a good source of which food substance?
A fibre B protein
C oxygen D vitamins
4 Why do we need protein in our food?
A It is a good source of energy.
B It is used for growth and repair.
C It is full of vitamins.
D It helps food to pass through the gut smoothly.
1 Which organ is labelled X in the drawing below?
A small intestine B stomach
C liver D mouth
2 In the diagram above what does the organ labelled X do?
A It mixes up food with acid and breaks down proteins.
B It adds vitamins to the food.
C It takes the water out of the food.
D It stores waste food until it can be got rid of.
3 In digestion:
A soluble food substances are made into insoluble ones.
B insoluble food substances are broken up into soluble ones.
C food is stored inside the body until it is needed.
D waste food is removed from the body.
4 The main chemicals used to digest foods are:
A vitamins. B salivas.
C digestifs. D enzymes.
1 Which label shows the place where digested food is taken into the blood?
2 The drawing shows a model gut. Which part represents the inside of the small intestine?
The enzymes in humans work best at body temperature. What temperature is this?
A 37 °C B 0 °C
C 100 °C D 98 °C
4 The pH of the mouth is about pH7. The conditions that enzymes in the mouth work best at are:
A neutral. B acidic.
C alkaline. D basic.
1 When digested food is taken into the blood it is said to be:
A egested. B ingested.
C absorbed. D insoluble.
2 Digested food is carried around the body in the:
A digestive system.
B circulatory system.
C breathing system.
D nervous system.
3 What is the digested food used for inside our bodies?
A to provide energy only
B to provide energy and chemicals to make new substances
C to help us go to the toilet more easily
D to provide substances to make sure that the blood does not become too runny
4 What job does an artery do?
A carries water to be mixed with blood
B carries blood to the heart
C carries blood away from the heart
D carries blood to the brain only