SAT Subject Biology Practice Question 325: Answer and Explanation

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Question: 325

15. A volunteer was injected intravenously with several test substances to determine the effect of each substance on normal body variables. The results are shown in Table 1. Assume that enough time was allowed between injections so that the substances do not interfere with one another.

Table 1

Based on the information in Table 1, which of the following is most likely substance A?

A. Glucagon
B. Aldosterone
C. Calcitonin
D. Parathyroid hormone
E. Insulin

Correct Answer: E


E Again, from Table 1, substance A caused a decrease in serum glucose levels, which is the effect that insulin has on the body.

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