A leader is the person who exerts __________ influence and provides direction and energy to the group.

The sleep–wake cycle is ultimately controlled by the part of the brain called the __________

a. optical nerve b. frontal lobe c. hypothalamus d. median forebrain bundle e. putamen

"Jet lag" is primarily a result of

a. anxiety-producing unconscious processes. b. upset circadian rhythms. c. hangover due to drinking alcohol before flying. d. sensory isolation due to flying in an enclosed airplane for a long time. e. flying many miles above sea level.