Asthma is a disorder caused by _____ the airways.

For Piaget, an important aspect of cognitive development was the child's ability to use

__________ that are __________. a. schemas; invertible. b. operations; irreversible. c. schemas; irreversible. d. operations; invertible. e. schemas; operations.

Holly quit smoking years ago, but sometimes she really misses the routine of going out for smoke breaks and starting the morning with coffee and a cigarette. At those times, Holly is struggling with _____

a) tolerance. b) psychological dependence. c) physical dependence. d) withdrawal.