Test yourself

Boss quiz

10 questions on the whole topic. You get one try at each.

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  1. Which tube carries air from your nose and mouth down towards your lungs?

    • The diaphragm
    • A bronchiole
    • The trachea
    • An alveolus

  2. In the alveoli, which gas moves from the air into the blood?

    • Oxygen
    • Carbon dioxide
    • Carbon monoxide
    • Water vapour

  3. What does the diaphragm do when you breathe in?

    • It fills up with air
    • It pushes the ribs down
    • It relaxes and domes upwards
    • It contracts and flattens

  4. When you breathe in, the volume of your chest gets bigger. What happens to the pressure inside your lungs?

    • It rises, so air is pushed out
    • It stays the same
    • It falls, so air is pushed in
    • It rises, so air is pushed in

  5. What is the difference between breathing and respiration?

    • Respiration moves air. Breathing releases energy.
    • Breathing moves air. Respiration releases energy in cells.
    • Breathing happens in cells. Respiration happens in the lungs.
    • They are two words for the same thing.

  6. A student takes a deep breath and breathes out as much air as she can into a measuring bottle. What is she measuring?

    • Her pulse
    • Her height
    • Her breathing rate
    • Her lung volume

  7. Why does your breathing rate go up when you exercise?

    • Your muscle cells need more oxygen
    • Your diaphragm stops working
    • Your muscle cells need less oxygen
    • Your lungs get smaller

  8. What happens to the airways in an asthma attack?

    • The muscles around them tighten, so they get narrower
    • The ribs squash them
    • They fill up with blood
    • The muscles around them relax, so they get wider

  9. Which substance in tobacco smoke takes the place of oxygen in red blood cells?

    • Carbon dioxide
    • Tar
    • Nicotine
    • Carbon monoxide

  10. Where are most of the stomata on a leaf?

    • On the underside
    • On the top surface
    • Inside the veins
    • On the stalk
Answers
  1. The trachea. The trachea is the windpipe. It splits into two bronchi.
  2. Oxygen. Oxygen diffuses into the blood. Carbon dioxide diffuses the other way.
  3. It contracts and flattens. A flatter diaphragm makes the chest bigger, so air is pushed in.
  4. It falls, so air is pushed in. A bigger volume means a lower pressure. The air outside is at a higher pressure, so it pushes in.
  5. Breathing moves air. Respiration releases energy in cells. Breathing moves air in and out of the lungs. Respiration is a chemical reaction in every cell.
  6. Her lung volume. Lung volume is a measure of the amount of air breathed in or out.
  7. Your muscle cells need more oxygen. Working muscles respire faster. They need more oxygen and make more carbon dioxide.
  8. The muscles around them tighten, so they get narrower. The lining swells and makes extra mucus too. Less air can get through.
  9. Carbon monoxide. Carbon monoxide means the blood carries less oxygen.
  10. On the underside. Most stomata are on the underside. Gases pass in and out through them.