Respiration Match the Equation Draw one line from each type of respiration to the correct equation. aerobic respiration glucose anaerobic respiration fermentation glucose lactic acid (+ energy) ethanol + carbon dioxide (+ energy) glucose + oxygen carbon dioxide + water (+ energy) True or False? True False Anaerobic respiration happens when there is a shortage of oxygen. Aerobic respiration leads to a build-up of lactic acid in the muscles. A build-up of lactic acid can lead to cramp. Anaerobic respiration releases more energy than aerobic respiration. During exercise, your breathing rate increases to get more oxygen into the body. Explain People often confuse respiration with breathing. Write a paragraph to clearly explain the difference between respiration and breathing. Gas Exchange Questions 1 1. Cells require oxygen so that they can respire and produce energy. Which of the following shows the route taken by oxygen to reach the cells? the correct box. • nose › lungs › windpipe › bloodstream › cells • nose › bloodstream › lungs › windpipe › cells • nose › windpipe › lungs › bloodstream › cells • nose › lungs › bloodstream › windpipe › cells 2. Respiration takes place in the cells of all organisms. Complete the word equation for respiration. + oxygen › carbon dioxide + + energy 3. As a result of respiration, the proportions of oxygen and carbon dioxide in inhaled and exhaled air vary. Which of the following statements are true? the correct boxes. • Air breathed out has more carbon dioxide and more oxygen than air breathed in. • Air breathed out has less carbon dioxide and less oxygen than air breathed in. • Air breathed out has more carbon dioxide and less oxygen than air breathed in. • Air breathed out has less carbon dioxide and more oxygen than air breathed in. • Air breathed out contains more water vapour and more carbon dioxide than air breathed in. 4. Label the following on the diagram: lungs, trachea, bronchiole, bronchus and alveoli. Gas Exchange Test Yourself 2 The diagram above shows an alveolus surrounded by blood vessels. Label the arrows to show: • the flow of oxygen; • the flow of carbon dioxide. Why do you think the alveoli are surrounded by blood vessels? Name 3 ways the alveoli are adapted to allow gases to diffuse from one area to another: 1. 2. 3. Rearrange the following to show the route taken by oxygen from the air until it reaches the blood vessels. blood vessels mouth or nose bronchioles bronchus alveoli trachea Respiration Match the Equation Draw one line from each type of respiration to the correct equation. aerobic respiration glucose anaerobic respiration fermentation glucose lactic acid (+ energy) ethanol + carbon dioxide (+ energy) glucose + oxygen carbon dioxide +water (+ energy) True or False? True False Anaerobic respiration happens when there is a shortage of oxygen. Aerobic respiration leads to a build-up of lactic acid in the muscles. A build-up of lactic acid can lead to cramp. Anaerobic respiration releases more energy than aerobic respiration. During exercise, your breathing rate increases to get more oxygen into the body. Explain People often confuse respiration with breathing. Write a paragraph to clearly explain the difference between respiration and breathing. Respiration is a chemical reaction that releases energy. Aerobic respiration occurs in the mitochondria of cells. Cells require a supply of oxygen for aerobic respiration. In mammals, oxygen is obtained by breathing. Breathing is the process of taking air into and releasing it from the lungs. Oxygen from the air diffuses from the lungs to the red blood cells, which transport it to the rest of the body. Gas Exchange Questions 1 Answers 1. Cells require oxygen so that they can respire and produce energy. Which of the following shows the route taken by oxygen to reach the cells? the correct box. • nose › lungs › windpipe › bloodstream › cells • nose › bloodstream › lungs › windpipe › cells • nose › windpipe › lungs › bloodstream › cells • nose › lungs › bloodstream › windpipe › cells 2. Respiration takes place in the cells of all organisms. Complete the word equation for respiration. glucose + oxygen › carbon dioxide + water + energy 3. As a result of respiration, the proportions of oxygen and carbon dioxide in inhaled and exhaled air vary. Which of the following statements are true? the correct boxes. • Air breathed out has more carbon dioxide and more oxygen than air breathed in. • Air breathed out has less carbon dioxide and less oxygen than air breathed in. • Air breathed out has more carbon dioxide and less oxygen than air breathed in. • Air breathed out has less carbon dioxide and more oxygen than air breathed in. • Air breathed out contains more water vapour and more carbon dioxide than air breathed in. 4. Label the following on the diagram: lungs, trachea, bronchiole, bronchus and alveoli. trachea lungs bronchus bronchiole alveoli Gas Exchange Test Yourself 2 Answers The diagram above shows an alveolus surrounded by blood vessels. carbon dioxide oxygen carbon dioxide oxygen Label the arrows to show: • the flow of oxygen; • the flow of carbon dioxide. Why do you think the alveoli are surrounded by blood vessels? To transport the oxygen around the body. Name 3 ways the alveoli are adapted to allow gases to diffuse from one area to another: 1. Thin 2. Moist 3. Large surface area Rearrange the following to show the route taken by oxygen from the air until it reaches the blood vessels. mouth or nose blood vessels mouth or nose trachea bronchioles bronchus bronchus bronchioles alveoli trachea alveoli blood vessels
