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Homeostasis is the maintenance of a stable internal environment (A-level only)

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Question 9

Scientists investigated whether a high-intensity exercise and diet programme would result in type II diabetes remission.

The scientists:

  • used a computer-generated randomized list to select 460 volunteers from multiple health centres
  • selected volunteers aged 30 to 65 years, each with less than 4 years duration of type II diabetes
  • divided the volunteers in the ratio 1 : 1 between experimental group X (exercise and diet programme) and control group Y
  • recorded outcomes after a 3-year duration.

The results are shown in the table below:

OutcomeGroup XGroup Y
Percentage achieving diabetes remission45.2%3.9%
Percentage achieving weight loss ≥12 kg\ge 12\text{ kg}≥12 kg18.3%2.6%
Percentage with weight loss ≥12 kg\ge 12\text{ kg}≥12 kg achieving diabetes remission68.0%72.0%
Percentage with weight gain achieving diabetes remission1.3%1.3%

Calculate the difference in the number of volunteers between the two groups who achieved diabetes remission. Show your working.

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Homeostasis is the maintenance of a stable internal environment (A-level only) Questions

  1. A Level
  2. /Biology
  3. /Homeostasis is the maintenance of a stable internal environment (A-level only)