1) What is digested food used for in our bodies? a) to provide carbon dioxide b) to provide oxygen c) to provide energy and chemicals to make new substances d) to provide energy only 2) What is the name of the process that releases energy in our bodies? a) respiration b) excretion c) reproduction d) photosynthesis 3) Living cells in the bodies of animals all produce a gas that turns limewater milky. This gas is: a) nitrogen. b) oxygen. c) carbon dioxide. d) carbon monoxide. 4) When glucose is burnt with oxygen, carbon dioxide and water are produced. The word equation for this is: a) oxygen + glucose --> carbon dioxide + water b) carbon dioxide + water --> glucose + oxygen c) glucose + oxygen --> carbon dioxide + water d) glucose + oxygen = water + carbon dioxide 5) The heart and blood vessels make up the: a) digestive system b) breathing system. c) nervous system. d) circulatory system 6) You can feel a pulse in your wrist. You feel one pulse beat for each: a) beat of your heart. b) minute c) second. d) breath you take 7) The smallest blood vessels are called a) arteries b) veins c) tributaries d) capillaries. 8) The heart has two halves. This is because: a) one half pumps blood around the body one way, and the other half pumps blood around the body in the other direction. b) one half pumps blood, and the other half pumps air. c) one half pumps blood to the lungs, and the other half pumps blood around the rest of the body. d) one half is not used except in an emergency 9) When you exercise: a) your pulse rate stays the same, but your breathing rate goes up. b) your pulse rate goes up, and your breathing rate goes up. c) your pulse rate goes down, but your breathing rate goes up. d) your pulse rate goes up, but your breathing rate goes down. 10) Which of these could not cause muscle tissue to die? a) The blood vessel leading to it becomes blocked. b) The blood vessel contains blood that is being pumped very quickly. c) The blood supplying it contains a poison. d) The blood supplying it carries more oxygen than normal. 11) How is carbon dioxide transported around the body? a) carried on red blood cells b) dissolved in the plasma c) carried on white blood cells d) as a gas 12) When Mary starts to run there is an increase in the amount of blood flowing through her blood vessels. Which of these explains why this needs to happen? a) Cells need more oxygen, and more carbon dioxide must be removed. b) Cells need more carbon dioxide, and more oxygen must be removed. c) There are greater amounts of oxygen and carbon dioxide that need to be removed from cells. d) Cells need more oxygen and more carbon dioxide. 13) Oxygen entering the blood would pass through the following lung structures in the order: a) bronchus --> trachea --> air sac --> alveoli b) trachea --> bronchus --> alveoli --> air sac c) alveoli --> trachea --> bronchus --> air sac. d) trachea --> bronchus --> air sac --> alveoli 14) Which of these is not a way in which the lungs are adapted to their job? a) The capillary walls are thick. b) There are many alveoli. c) There are many capillaries d) The air sac walls are thin 15) What is breathing? a) air moving in and out of the lungs b) when glucose and oxygen react to form carbon dioxide and water c) when oxygen is taken into the lungs d) muscles making the lungs change size 16) Mucus lines the air passages and traps dirt and tiny organisms called microbes. It is moved up and out of the lungs by tiny hairs called: a) cilia b) villi c) filaments d) bristles 17) Exhalation is the correct scientific term for: a) bad breath b) breathing out. c) breathing in d) breathing 18) What substance can be used to test for the presence of carbon dioxide? a) iodine solution b) limewater c) oxygen d) cobalt chloride 19) The air around you contains: a) more oxygen and more water vapour than the air in your lungs. b) more oxygen and less carbon dioxide than the air in your lungs c) more carbon dioxide and less oxygen than the air in your lungs. d) more carbon dioxide and less water vapour than the air in your lungs 20) What do fish use to take oxygen out of the water? a) lungs b) gills c) swim bladders d) noses

8B Quiz

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