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2 marksTransport Systems and Locomotion

CSEC Integrated Science · May/June 2012 · Paper 2 · Question 3(b)(iv)

Sammy and James rested then started running across a playing field. Their heart rates over time are shown in Figure 4.

Suggest TWO reasons for the change in heart rate of the boys between 0 and 30 seconds.

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Other parts of this question

  1. 3(a)(i)Identify the structures labelled Q, R, S, and T. Write your answers in the spaces provided.[4 marks]
  2. 3(a)(ii)State the MAJOR function of the heart.[1 mark]
  3. 3(b)(i)Using the graph in Figure 4, describe the general trend in the heart rate of the boys with time.[1 mark]
  4. 3(b)(ii)Determine Sammy's heart rate at 150 seconds.[1 mark]
  5. 3(b)(iii)What is the maximum heart rate experienced by James?[1 mark]
  6. 3(c)(i)How would Sammy's rib cage move, as he runs back and forth?[1 mark]
  7. 3(c)(ii)How would Sammy's body benefit from the movement described in (c)(i) above?[1 mark]
  8. 3(d)(i)Describe TWO possible side effects that the smoke may have on their respiratory system.[2 marks]
  9. 3(d)(ii)State ONE negative effect of the gardener's action on the physical environment.[1 mark]

More practice: the rest of this paper · more Transport Systems and Locomotion questions · all CSEC Integrated Science past papers