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2 marksThe Circulatory and Lymphatic Systems

CSEC Human and Social Biology · January 2014 · Paper 2 · Question 2(a)(i)

Figure 3 shows an electron micrograph of blood cells.

Name the structures labelled A and B in Figure 3.

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Other parts of this question

  1. 2(a)(ii)State ONE function of EACH of the structures labelled A and B.[2 marks]
  2. 2(b)During blood clotting, fibrinogen is converted to fibrin. State which of these two proteins is soluble and which is insoluble.[2 marks]
  3. 2(c)Complete the drawing of the artery in Figure 5 to show the effects of nicotine on the artery, and annotate your drawing to explain how nicotine affects the…[5 marks]
  4. 2(d)After sitting on a stool for several hours, Robert notices his lower limbs feel very heavy, but walking around relieves this sensation. Explain the association…[4 marks]

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