Females are better at solving spatial rotation tasks than males

Approximately what percentage of university students have engaged in non-suicidal self-injury?

a) 5% b) 10% c) 14% d) 18%

Addictive drugs do all of the following EXCEPT

a. cause the neurotransmitter acetylcholine to be released, resulting in intensified feelings of fear and paranoia. b. fool brain-reward pathways creating a compulsion to repeat the drug experience. c. stimulate a brain region called the nucleus accumbens. d. physically change the brain's reward circuitry, making it harder for the addict to overcome his or her addiction.