Neuroimaging reveals how the brain functions during certain activities. As a child is exposed to a new puzzle toy, we can expect an increase in ____ involvement. After the puzzle becomes familiar to the child, involvement in the ____ will become highly active.?

In 1999, what percentage of 36-month-old toddlers were toilet trained?

a) 60% b) 50% c) 45% d) 25%

Which statement best describes the effects of castration on sexual behavior in humans?

a. We are more affected by castration than other animals b. Males eventually lose the ability to copulate; females do not c. The ability of males to have erections is maintained, but sex drive is low; little if any changes occur in the females d. Sexual behavior declines but is still present because the adrenals secrete enough hormones to maintain sexual desire