In Siegel et al.'s study of heroin tolerance in rats,which group experienced the lowest mortality rate when given a large dose of heroin?
A)the group that had not previously been exposed to heroin
B)the group that received the large dose in the same environment as the group that had received smaller doses
C)the group that received the large dose in a different environment from where the group had received smaller doses
D)All groups had about the same mortality rates.

Question

Quizplus · Accepted Answer

In the study, the group that received the large dose of heroin in the same environment as the group that had received smaller doses experienced the lowest mortality rate. This suggests that previous exposure to heroin in the same environment may have provided some level of tolerance to the drug.

In Siegel Et Al