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4 marksSocial and Preventative Medicine

CAPE Biology Unit 2 · May/June 2026 · Paper 2 · Question 3(c)(ii)

The following procedure was proposed for the investigation. Procedure 1. Take initial heart rate in the classroom. 2. Divide students into groups and give each group of students one type of exercise to do. 3. Take heart rate again after each student finishes exercising. 4. Calculate the average percentage increase in heart rate and plot the average percentage increase in heart rate for each exercise/group.

Suggest FOUR ways that the procedure could have improved.

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Other parts of this question

  1. 3(a)(i)State what occurs at the stages labelled I–IV in Figure 9.[4 marks]
  2. 3(a)(ii)State the type of immune response that BEST describes phagocytosis.[1 mark]
  3. 3(a)(iii)State TWO reasons why phagocytosis is important.[2 marks]
  4. 3(b)(i)Describe the function of the following types of T cells.[4 marks]
  5. 3(b)(ii)Describe the results obtained under natural conditions and therapeutic conditions as shown in Figure 10 on page 20.[4 marks]
  6. 3(b)(iii)State ONE suitable conclusion that can be made based on the results shown in Figure 10. You MUST give a reason to support your conclusion.[2 marks]
  7. 3(c)(i)State a suitable hypothesis for this experiment.[1 mark]
  8. 3(c)(iii)Discuss TWO biological consequences of the progression of heart disease in Country X. Your response for EACH consequence MUST include one social issue and one…[8 marks]

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