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3.1 Communicable diseases

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Question 19

A healthcare worker takes a blood sample from a patient. The worker wipes the patient's skin with disinfectant before inserting the needle. The patient takes a medicine that slows blood clotting.

a.

Explain why wiping the skin with disinfectant reduces the risk of infection.

[2]
b.

After the needle is removed, skin secretions are present around the puncture. Suggest how these secretions reduce the risk of infection.

[1]
c.

Describe how the medicine affects the body's defence at the puncture after the needle is removed.

[2]
Markscheme

3.1 Communicable diseases Questions

  1. GCSE
  2. /Biology
  3. /3.1 Communicable diseases

252 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.

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