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2.2 Animal tissues, organs and organ systems

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Question 56
F

Which is a disadvantage of a mechanical heart valve but not of a biological heart valve?

[1]
A

The patient must take drugs to stop the blood clotting for the rest of their life

B

The valve may wear out after 12 to 15 years and then have to be replaced again

C

The patient needs major surgery, which carries a risk of infection and bleeding

D

The valve may be rejected by the patient's own immune system after the surgery

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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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