SAT Subject Biology Practice Question 127: Answer and Explanation

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Question: 127

17. Medical researchers tested two different medications for treating type I diabetes. Both Drug 1 and Drug 2 mimic the effects of insulin on muscle, brain, and liver cells. The graph depicts the serum (blood) levels of the drugs in patients through eight hours after injection.

How will the two drugs most likely differ in their effects on a diabetic patient's blood glucose level?

A. Drug 2 is more likely to cause blood glucose to drop too low.
B. Drug 2 is more likely to cause blood glucose to rise too high.
C. Drug 1 is more likely to cause blood glucose to remain high after a meal.
D. Drug 1 is more likely to cause the liver to break down glycogen.
E. Drug 2 is more likely to cause the liver to break down glycogen.

Correct Answer: A

Explanation:

Because Drug 2 peaks soon after injection, it is more likely than Drug 1 to cause blood glucose to drop too low after a meal. Drug 2 mimics the effects of insulin, which allows blood glucose to enter the cells of the body, decreasing the amount of glucose in the blood.

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