5.3 Hormonal coordination in humans

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Question 13
Easy

Scientists investigated the effect of a new drug, Drug Y, on blood glucose levels in diabetic rats.

The rats were divided into two groups:

  • Group P: Received a control treatment.
  • Group Q: Received Drug Y.

After treatment, both groups were given a glucose drink at time t=0t = 0t=0 minutes. The blood glucose concentration of each group was measured over a period of 120 minutes. The results are shown in the graph below.

Line graph showing blood glucose concentration over 120 minutes for two groups of rats, Group P and Group Q. The horizontal axis is 'Time (minutes)' from 0 to 120 with major grid lines every 15 minutes (0, 15, 30, 45, 60, 75, 90, 105, 120). The vertical axis is 'Blood glucose concentration (mmol/dm³)' ranging from 0 to 20 with major grid lines every 2 units. Group P (represented by a solid line) starts at 6.0 mmol/dm³ at time 0, rises linearly to a peak of 18.0 mmol/dm³ at 45 minutes, then decreases to 14.5 mmol/dm³ at 60 minutes, 10.0 mmol/dm³ at 90 minutes, and 7.5 mmol/dm³ at 120 minutes. Group Q (represented by a dashed line) starts at 6.0 mmol/dm³ at time 0, rises linearly to a peak of 11.5 mmol/dm³ at 15 minutes, then decreases to 10.0 mmol/dm³ at 30 minutes, 8.5 mmol/dm³ at 60 minutes, 7.0 mmol/dm³ at 90 minutes, and 6.0 mmol/dm³ at 120 minutes.

a.

How many minutes earlier did Group Q reach its maximum blood glucose concentration compared to Group P?

[2]
b.

Determine the difference between the maximum blood glucose concentration of Group P and the maximum blood glucose concentration of Group Q in mmol/dm3\text{mmol/dm}^3mmol/dm3.

[2]

5.3 Hormonal coordination in humans Questions

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