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6 marksHomeostasis and Hormonal Action

CAPE Biology Unit 2 · May/June 2019 · Paper 2 · Question 2(a)(i)

Impaired glucose tolerance is a risk factor for certain diseases. An oral glucose tolerance test was administered to persons with normal glucose tolerance (NGT) and impaired glucose tolerance (IGT1 and IGT2). Blood plasma glucose levels were monitored at 30-minute intervals for 2 hours. The data are given in Table 1.

On the grid provided on page 11, plot a line graph of the data provided in Table 1 with time on the x-axis.

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Other parts of this question

  1. 2(a)(ii)State TWO key observations that can be made based on the results of this study.[2 marks]
  2. 2(a)(iii)Explain the mechanisms by which glucagon and insulin function to maintain a normal concentration of glucose in the blood.[6 marks]
  3. 2(a)(iv)Comment on the clinical significance of the presence of glucose in the urine.[2 marks]
  4. 2(b)With reference to the properties of ethylene, analyse its actions to bring about desirable changes in fruits during commercial ripening.[6 marks]
  5. 2(c)In the space below, construct an annotated flow chart to illustrate the mechanism by which the body responds to reduced blood water content (low water…[8 marks]

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