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4 marksThe Circulatory and Lymphatic Systems

CSEC Human and Social Biology · May/June 2017 · Paper 2 · Question 2(c)

George experiences excessive tiredness after playing and is diagnosed with sickle-cell anaemia.

Explain why sickle-cell anaemia causes George to experience fatigue.

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Other parts of this question

  1. 2(a)(i)Identify the anatomical structures labelled X and Y in Figure 1.[2 marks]
  2. 2(a)(ii)State one function of the structure labelled X.[1 mark]
  3. 2(b)Complete the table by providing the blood cell name (A), the function of white blood cells (B), and the shape of platelets (C).[3 marks]
  4. 2(d)(i)Explain the difference between blood plasma and serum.[2 marks]
  5. 2(d)(ii)Explain the relationship between blood plasma and tissue fluid.[3 marks]

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