The attending nurse tells the expectant mother that her contractions are approximately five minutes apart. What hormones are high enough in the mother to cause the uterus to begin periodic contractions?

Which hemisphere of the cerebral cortex is usually dominant in spatial tasks?

a. the front hemisphere b. the rear hemisphere c. the left hemisphere d. the right hemisphere

According to Vygotsky, cognitive development proceeds as a result of

A) proceeding through qualitative stages of development. B) social interactions in which partners jointly work together to solve problems. C) maturation of the prefrontal cortex of the brain. D) increased speed of information processing.