Question 1
Which type of blood vessel contains valves?
- Artery
- Capillary
- Vein
- Aorta
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Answer: C (1) Veins have valves
Question 2
Describe three differences between the structure of an artery and the structure of a vein.
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- artery wall thicker than vein wall (1)
- artery lumen narrower than vein lumen (1)
- veins have valves, arteries do not (1)
Question 3
Supplement (what this means)
Supplement: only for the Extended papers (2 and 4). Core students can skip it. What the labels meanExplain how the structure of arteries and veins is related to the pressure of the blood they carry.
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- arteries carry blood at high pressure (1)
- thick walls with muscle and elastic fibres withstand the pressure (1) allow narrow lumen maintains pressure
- veins carry blood at low pressure so walls are thinner / lumen is wide (1)
- valves in veins stop backflow (1)