問題詳情：
Ever feel like you’ve been hit on the head after a bad night’s sleep? According to scientists, the thought isn’t as unbelievable as it seems.
A study found going without sleep for just one night causes changes in the brain similar to those that occur after a blow to the head. The researchers said the healthy young men examined in the study showed a sudden increase in the same chemicals which indicate brain damage. Professor Christian Benedict, of Uppsala University, Sweden, explained that the chemicals NSE and S-100B are biomarkers(生物指標) for brain damage, such as concussion(腦震盪). He said, "What we found was their levels in the blood rose in the group that went without sleep for a night. This was not to the extent that would happen after a head injury, for instance, but it was still significant. During sleep, the brain cleans poisonous substances off itself."
Benedict also said previous studies which linked a lack of sleep with increased risk of Alzheimer’s, Parkinson’s and multiple sclerosis could applaud his study. The rise of the chemicals in the blood after sleep loss may suggest not getting enough sleep contributes to a loss of brain tissue, he explained. Benedict, whose study is published in the journal Sleep, added, "In conclusion, the findings of our experiment indicate a good night’s sleep may be critical to maintaining brain health."
A third of the UK population suffer from sleep-related problems, while the average person now sleeps for only seven hours a night, compared with almost nine a few decades ago. Many scientists believe irregular sleeping patterns lead to illnesses ranging from aches and pains to heart disease, while less than eight hours’ sleep a night can lower the IQ the next day.
8．If you don’t sleep for a night, what will happen?
and S-100B will increase.
brain damage will be like a head injury.
will suffer from concussion.
brain will get rid of poisonous substances.
9．What do we know about previous studies?
found reasons for brain disorders.
r findings were published in Sleep.
were supported by Benedict’s study.
focused on brain health.
10．What can we infer from the last paragraph?
people have the worst sleep.
’s intelligence is affected by sleep in a way.
le were smarter in the past.
D.A lack of sleep causes all brain-related problems.
11．What’s the main idea of the passage?
t hours’ sleep is important.
lar sleeping patterns improve health.
p loss is close to a blow to the head.
n brains work during sleep.
【回答】
ACBC
知識點：科普環保類閲讀
題型：閲讀理解
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