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2.2 Animal tissues, organs and organ systems

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Question 27
F

Veins contain valves along their length but arteries do not. Which statement explains this difference?

[1]
A

Blood in a vein flows more slowly, so the vessel must be held open

B

Blood in a vein is at low pressure, so it could flow backwards easily

C

Blood in a vein is deoxygenated, so it is kept apart from other blood

D

Blood in a vein travels further, so it needs help from the vessel wall

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2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

179 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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