Santiago, a student, is introduced to smoking cigarettes by his friends. After smoking a cigarette for the first time, he experiences an immense high of nicotine. However, after two months of smoking, he is able to experience the same high only after smoking six cigarettes. Which of the following best explains Santiago's need to smoke an increased number of cigarettes to get the same effect?
A. dopamine dependence
B. revocation
C. withdrawal
D. tolerance

Who built the first turnpikes in the united states? a) the national government b) state governments c) private companies d) town councils

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.

Federalism began to spread super soon after