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2 marksThe Circulatory System of Mammals

CAPE Biology Unit 2 · January 2023 · Paper 2 · Question 1(d)(vi)

Figure 1 shows an apparatus set-up used to demonstrate a process, with labels for a glass tube, balloons, bell-jar, and rubber sheet.

Give TWO reasons for the expected observation stated in (v).

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Other parts of this question

  1. 1(a)Write a balanced chemical equation to summarize the process of aerobic respiration.[2 marks]
  2. 1(b)List TWO characteristics of gaseous exchange surfaces in mammals.[2 marks]
  3. 1(c)Suggest THREE ways in which respiration differs from breathing.[6 marks]
  4. 1(d)(i)Name the process being demonstrated in Figure 1.[1 mark]
  5. 1(d)(ii)Name the structures in humans that are represented by the following labels on the apparatus in Figure 1. Label: Glass tube (vertical), Balloons, Bell jar,…[4 marks]
  6. 1(d)(iii)Suggest TWO reasons why a glass bell jar was used instead of a plastic bag, in setting up the experiment.[2 marks]
  7. 1(d)(iv)State TWO consequences of a puncture in the human structure that is represented by the rubber sheet.[2 marks]
  8. 1(d)(v)During the experiment, a student pulls the rubber sheet downwards. State the expected observation.[1 mark]
  9. 1(e)List THREE precautions that should be taken when setting up the apparatus in Figure 1 on page 5.[3 marks]

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