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The graph below shows the effect of injecting one unit of insulin into a person. The concentration of glucose in the blood is measured at regular intervals.
         graph showing the effect of injecting insulin

  1. Give the lowest value of blood glucose observed and the time it was recorded. 
  2. Explain the fall in blood glucose level.
  3. Name the mechanism that led to the increase in blood glucose level when it had been falling.

1 Answer

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    • 60mg/100cm3;
    • time when observed –after 30 minutes
  1. Insulin stimulated liver cells to convert some glucose to glucogen ;while some of the glucose was oxidized to provide energy; 
  2. Negative feedback mechanism;

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