Carmen, age 82, lives with her son Lance, who regularly fails to fulfill needed caregiving obligations. As a result, Carmen often lacks medication, fails to eat meals, and feels isolated. Carmen is a victim of __________

Piaget believed that infants under the age of one year

cannot use internal representations and have no memory of people and objects that are out of sight. Such abilities, he believed, emerge only after a. a child becomes less egocentric. b. a long period of sensorimotor development. c. speech has progressed beyond its earliest stages. d. a child develops reversibility.

The major disadvantage of a blood-brain barrier is that ____

a. many chemicals can easily diffuse into the brain b. so much glucose is required to maintain it c. certain required chemicals must be actively transported d. viruses cannot escape