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1 markSubstance Abuse

CAPE Biology Unit 2 · 2003 · Paper 1 · Question 9(c)(i)

The legal upper limit for blood alcohol is 80 mg/100 cm3; a breath test failure is over 35 µg in every 100 cm3 of exhaled air.

Since alcohol is taken into the body through the digestive system, explain why breath is analysed.

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Other parts of this question

  1. 9(a)Complete Table 2 by adding information about the effects of alcohol on behaviour for the given blood alcohol concentration ranges.[4 marks]
  2. 9(b)Recommendations for safe consumption of alcohol changed from 'units per week' to 'units per day'. Suggest ONE advantage of the new time period.[1 mark]
  3. 9(c)(ii)State why 35 µg and not 80 mg is the critical point in the breathalyzer test.[1 mark]
  4. 9(d)State ONE other body fluid that could be used to assess the alcohol content of the body.[1 mark]
  5. 9(e)Distinguish between physical and psychological drug dependence.[2 marks]

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