A key gene in addiction controls COMT, an enzyme that breaks down ____ after its release

Which of the following microscopes can be used with thicker sections than usually required?

a. The four-photon microscope b. The electron microscope c. The confocal laser scanning microscope d. The light microscope

Research assessing the effectiveness of needle/syringe exchange programs for drug abusers has indicated that these programs generally

a. lead to increased use of illicit drugs, while having little effect on the incidence of transmission of infectious diseases such as HIV/AIDS. b. lead to a reduction in the transmission of infectious diseases such as HIV/AIDS, but there is an increase in the use of illicit drugs. c. lead to a reduction in the transmission of infectious diseases such as HIV/AIDS, without producing an increase in the use of illicit drugs. d. have no effect on either the transmission of infectious diseases such as HIV/AIDS or the incidence of use of illicit drugs.