__________ rewards are more likely to strengthen the internal sense of satisfaction a person has already gained from the mastery associated with completing a task

Although playing catch and flying a kite in the park appear to be simple activities, in reality, each of these activities requires the work of many billions of individual nerve cells called

a. synapses. b. neuropeptides. c. neurons. d. neurotransmitters.

An obsession is a ________, while a compulsion is a ________

a. delusion; strong emotion b. form of species-typical behavior; learned behavior c. thought; behavior d. learned behavior; delusional thought e. recurring feeling of anxiety; form of intense euphoria