According to recent research (Johnson et al., 2000), an increased risk of developing anxiety disorders was found among teenagers who
a. smoked marijuana.
b. smoked cigarettes.
c. drank alcohol.
d. used steroids.
Question 2
According to Jeffrey Gray, a British neuropsychologist, the behavioral inhibition system (BIS) is activated by danger signals ________, resulting in the experience of anxiety.
a. ascending from the brain stem
b. descending from the cortex
c. arising from both the brain stem and the cortex
d. within the amygdala only
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