A key motor function of the reticular formation is to
a. directly excite spinal cord alpha motor neurons.
b. facilitate movements through inhibition of the internal division of the globus pallidus.
c. excite noradrenergic neurons within the substantia nigra.
d. control muscle tone through the gamma motor system.
e. control the activity of the cerebellum.
Answer: d. control muscle tone through the gamma motor system.
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Evidence of life-course-persistent delinquents is first evident:
a. at infancy b. in toddler years c. in early childhood d. in middle childhood
When socioeconomic status (SES) and other living conditions are matched across non-Hispanic whites and African Americans, differences in IQ scores are
A) not influenced. B) far smaller. C) increased by a small amount. D) significantly increased.