Which of the following classes of drugs increases alertness, elevates mood, and produces a feeling of well-being?

Yamile's parents are reported to authorities because they are abusing Yamile. When she is examined, she has no marks on her body. However, she reports that she has not eaten in days and is dressed in soiled clothing

What type of abuse should the authorities investigate further? a. physical b. sexual c. emotional d. neglect

Stem-cell research is one of the hottest areas in biology and neuroscience because stem cells are:

a. pluripotent. b. unipotent. c. readily available in nature for research. d. immune to most common ailments.