The __________ model is a theory of language processing that assumes separate lexicons for each language connected by a common underlying conceptual level.

Psychedelic drugs ________

a. speed up activity in the central nervous system. b. disrupt normal thought processes. c. slow down activity in the central nervous system. d. are derived from the opium poppy, which relieves pain and produces euphoria.

Stimulants are ________

a. drugs that speed up activity in the central nervous system. b. drugs capable of influencing perception, mood, cognition, or behavior. c. drugs that slow down activity in the central nervous system. d. drugs derived from the opium poppy that relieve pain and produce euphoria.