Blood

Blood Quiz

Spec 9.4 · Cambridge IGCSE Biology: Quiz

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5 questions, one answer each

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  1. 1. Which blood vessel has the thickest muscular wall and why?

    • A. Arteries, because they carry blood at high pressure from the heart
    • B. Veins, because they need to pump blood back to the heart
    • C. Capillaries, because they need to withstand high velocity blood flow
    • D. The vena cava, because it carries blood from the entire body

  2. 2. What is the main function of capillaries in the circulatory system?

    • A. To transport blood quickly around the body
    • B. To exchange substances between blood and tissue fluid
    • C. To prevent backflow of blood
    • D. To filter waste products from the blood

  3. 3. Why do veins have valves whilst arteries do not?

    • A. Arteries don't need valves because blood pressure is high enough to prevent backflow
    • B. Veins have valves because blood moves away from the heart at low pressure and could flow backwards
    • C. Valves in veins help to increase blood pressure
    • D. Arteries have valves in the heart instead

  4. 4. A student observes that an artery has a small lumen and thick muscular walls, whilst a vein has a larger lumen and thinner walls. How does the structure of the vein relate to its function of returning blood to the heart?

    • A. The larger lumen reduces resistance to blood flow, allowing blood to return efficiently at lower pressure
    • B. The thinner walls allow the vein to contract more powerfully
    • C. The larger lumen helps the vein to pump blood faster
    • D. The thinner walls mean less muscle is needed to filter the blood

  5. 5. The hepatic portal vein carries nutrient-rich blood from the small intestine to the liver. How does this blood vessel's function differ from the hepatic artery and hepatic vein that also serve the liver?

    • A. The hepatic portal vein carries oxygenated blood, whilst the artery and vein carry deoxygenated blood
    • B. The hepatic portal vein transports absorbed nutrients for processing, whilst the hepatic artery supplies oxygen and the hepatic vein removes waste products
    • C. The hepatic portal vein is the only vessel that allows nutrient exchange in the liver
    • D. The hepatic portal vein has valves to prevent backflow of nutrients

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