____ is the hormone secreted by the pancreas used to transport glucose to the body's cells

REM sleep normally occurs for the first time ________

a. within 10 minutes of falling asleep. b. after about an hour of sleep. c. about 70 to 90 minutes after sleep onset. d. after about 3–4 hours of sleep.

For Piaget, cognitive advances at each stage were reflected not just in the answers children devised for problems, but in ____

a. their explanations for how they came to the solution b. the emotional maturity with which they solved the problems c. how long the child would stay on task d. the advancement of the child's memory abilities