[填空题]Relaxed throat muscles block the airway of a sleeping person and leads to his/her snoring.

[填空题]Relaxed throat muscles block the airway of a sleeping person and leads to his/her snoring.

[简答题]sleep debt

[单项选择]
Sleep restores the body and the mind and helps prevent disease by strengthening the immune system. However, many adults do not get the recommended eight hours of sleep each night. The average adult today gets only 6.4 hours of sleep, nearly an hour and a half less than what the average person received a century ago. Only in recent years have health professionals begun to realize the prevalence and severity of sleep deprivation in the working population. A significant number of people work at night, work long shifts, or suffer from insomnia or jet lag. Others are deprived of sleep because they work too hard, stay out too late, or try to do too many things in a day. Adults who regularly sleep six hours or less might think they accomplish more by staying up late, but they pay for it the next day when they feel sleepy or irritable or are unabl
A. A century ago, health professionals did not experience sleep deprivation; however, now it is a part of their jobs.
B. It is difficult to understand why health professionals have not studied the consequences of sleep deprivation.
C. Sleep deprivation used to affect only certain professions, but now it occurs in all sectors of the working population.
D. Health professionals have just started to understand that sleep deprivation in workers is a serious problem.

[单项选择]
To sleep. Perchance to file Findings published online this week by the Proceedings of the National Academy of Sciences further support the theory that the brain organizes and stows memories formed during the day while the rest of the body is catching zzz’s.
Gyorgy Buzsaki of Rutgers University and his colleagues analyzed the brain waves of sleeping rats and mice. Specifically, they examined the electrical activity emanating from the somatosensory neocortex (an area that processes sensory information) and the hippocampus, which is a center for learning and memory. The scientists found that oscillations in brain waves from the two regions appear to be intertwined. So-called sleep spindles (bursts of activity from the neocortex) were followed tens of milliseconds later by beats in the hippocampus known as ripples. The team posits that this interplay between the two brain regions is a key step in memory con
A. Does brain arrange memories in useful order during sleep
B. Does brain have memories when one is sleeping
C. Does brain remember files after one falls asleep
D. Does brain work on files in sleep