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The Hardest Quiz About Your Body You Will Ever Take

Unless you're studying it at degree level, of course. Based on test questions from A-Level Human Biology.

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  1. 1. How many bones does an adult human have?

    206
    306
    Correct!
    Wrong!

    We start out with over 300 bones, but as we grow up some fuse together and we end up with 206.

  2. 2. How does haemoglobin transport oxygen?

    OCR / ocr.org.uk
    Haemoglobin and oxygen bind temporarily to form oxyhaemoglobin.
    Haemoglobin and oxygen fuse together, and the haemoglobin later dissolves.
    Correct!
    Wrong!

    And it's happening in your blood RIGHT NOW.

  3. 3. How many oxygen molecules can one haemoglobin molecule carry?

    4
    8
  4. 4. Which part of your brain regulates sleep?

    Medulla oblongata
    Suprachiasmatic nucleus
    Correct!
    Wrong!

    Here's a handy song that will help you remember what it does.

  5. 5. Complete the sentence: "A water molecule has an uneven distribution of charge, so it is said to be ____."

    ionic
    polar
    Correct!
    Wrong!

    Bodily fluids contain water because it's an ideal transport medium.

  6. 6. Which of these is an electrolyte found in blood plasma?

    Sodium ions
    Globulins
    Correct!
    Wrong!

    Globulins are proteins in the blood.

  7. 7. A vein is made up of different tissues. What sort of tissue is labelled "a" on the below diagram?

    Endothelium
    Capillary
    Correct!
    Wrong!

    The endothelium is a thin layer of cells on the inside of veins and arteries.

  8. 8. In the above diagram, what does the part labelled "b" do?

    Allow blood to flow only one way.
    Support the walls of the vein.
    Correct!
    Wrong!

    It's a valve.

  9. 9. In the above diagram, what sort of fibres are "c"?

    Collagen
    Elastic
    Correct!
    Wrong!

    There are elastic fibres in a vein, but they're the layer above the endothelium.

  10. 10. Which of these is a base pair?

    Adenine and Guanine
    Adenine and Thymine
    Correct!
    Wrong!

    Adenine pairs with thymine, and cytosine pairs with guanine.

  11. 11. What's the name of the space inside a tubular structure, like a vein or bronchiole?

    Lumen
    Serosa
    Correct!
    Wrong!

    It's lumen. The serosa is a fluid-secreting membrane that covers some of your organs.

  12. 12. Which of these happens in the lungs when someone has an asthma attack?

    The bronchioles are constricted and mucus is produced.
    The muscles in the bronchioles relax.
    Correct!
    Wrong!

    The muscles in the bronchioles actually contract, restricting the amount of air that can pass through bronchioles in the lungs.

  13. 13. The simplified diagram below shows meiosis, during which cells divide to form gametes. What type of cell is labelled "a"?

    OCR / ocr.org.uk
    Haploid
    Diploid
    Correct!
    Wrong!

    Diploid cells have the full number of chromosomes. Gametes are haploid cells, and they have half the number of chromosomes as usual.

  14. 14. Which molecule sits on the inner membrane of mitochondria?

    ATPase
    FAD
    Correct!
    Wrong!

    FAD (flavin adenine dinucleotide) molecules live in mitochondria, but they're in the matrix.

  15. 15. Nerve impulses are caused by the change in concentration of what?

    Sodium and potassium ions
    Calcium and zinc ions
  16. 16. What does the Golgi apparatus in your cells do?

    Packages proteins
    Stores ATP
    Correct!
    Wrong!

    It's the largest organelle and was one of the first to be discovered. It's present in eucaryotic cells.

  17. 17. Which of these does NOT apply to energy-storing molecule glycogen?

    It's a carbohydrate.
    It's insoluble in water.
    It's a hexose sugar.
    Correct!
    Wrong!

    Glycogen is a polysaccaride of glucose. It provides long-term energy storage and is stored mostly in your liver and muscles. A hexose sugar is a monosaccharide with just six carbon atoms.

  18. 18. How many neurons are there in the average brain?

    86 billion
    86 million
    Correct!
    Wrong!

    It's 86 billion. So many.

The Hardest Quiz About Your Body You Will Ever Take

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Pretty good! You've obviously been revising.

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Amazing! You know your insides inside-out. Congratulations.

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