首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Many adults may think they’re getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to n
Many adults may think they’re getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to n
admin
2019-05-04
86
问题
Many adults may think they’re getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to not getting their prescribed amount of nightly rest. Research shows that adults need an average of seven to nine hours of sleep a night for optimal functionality.
By getting less than six hours of sleep a night, you put yourself at risk for high blood pressure. When you sleep, your heart gets a break and slows down for a significant period of time. But cutting back on sleep means your heart has to work overtime without its allotted break. In constantly doing so, your body must accommodate to its new conditions and elevate your overall daily blood pressure. And the heart isn’t the only organ that is overtaxed by a lack of sleep. The less sleep you get, the less time the brain has to regulate stress hormones, and over time, sleep deprivation could permanently hinder the brain’s ability to regulate these hormones, leading to elevated blood pressure.
Prolonged sleep deprivation has long been associated with diminished immune functions, but researchers have also found a direct correlation between "modest" sleep deprivation—less than six hours—and reduced immune response.
During deep REM sleep, your muscles (except those in the eyes) are essentially immobilized in order to keep you from acting out on your dreams. Unfortunately, this effort your body makes to keep you safe while dreaming can sometimes
backfire
, resulting in sleep paralysis. Sleep paralysis occurs when the brain is aroused from its RMR cycle, but the body remains in its immobilizing state. This can be quite a frightening sensation because, while your mind is slowly regaining consciousness, it has no control over your body, leaving some with a feeling of powerlessness, fear and panic.
Imagine all of your memories are erased. It’s a chilling thought, but that is what a life without sleep would be like. Sleep is essential to the cognitive functions of brain, and without it, our ability to consolidate memories, learn daily tasks, and make decisions is impaired by a large degree. Research has revealed that REM sleep, or dream-sleep, helps solidify the "fragile" memories the brain creates throughout the day so that they can be easily organized and stored in the mind’s long-term cache.
The word "backfire" (Paragraph 4) is closest in meaning to______.
选项
A、produce explosion
B、trigger the opposite effect
C、cause fire in the backyard
D、lead to sleep paralysis
答案
B
解析
第四段第一句说,在快速眼动睡眠(REM)的时候,除了眼睛上的肌肉以外,你全身的肌肉基本上都是不动的,这是为了让你在做梦时不会肢体乱动(以免弄伤自己)。紧接着第二句,用unfortunately进行转折:你全身肌肉不动是为了保护你睡眠的安全,可有时也会backfire,即引起“睡眠瘫痪”。根据上下文的逻辑,可以看出backfire的意思是选项[B],即产生事与愿违的结果。
转载请注明原文地址:https://kaotiyun.com/show/RMe4777K
0
考研英语二
相关试题推荐
Bysayingthatacountry’sagriculturalsurplusesoften"complicate"itseconomy,theauthormeans______.Accordingtothepas
Excitement,fatigue,andanxietycanallbedetectedfromsomeone’sblinks,accordingtopsychologistJohnStern(21)Washington
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal(21)anarea.Thesizeoftheareaissufficientt
Thelongestbullruninacenturyofart-markethistoryendedonadramaticnotewithasaleof56worksbyDamienHirst,Beauti
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
WholesalepricesinJulyrosemoresharplythanexpectedandatafasterratethanconsumerprices,【1】thatbusinesseswerestill
Johnsaysthathispresentjobdoesnotprovidehimwithenough______forhisorganizingability.
Lowwages,chronicunemploymentandunderemploymentleadtolowincome,lackofpropertyownership,absenceofsavings,absence
Parentsofchildrenwhohappilyeatwhat’sputinfrontofthemmightassumetheirkidsarewellnourished.Buttwonewstudies
Parentsofchildrenwhohappilyeatwhat’sputinfrontofthemmightassumetheirkidsarewellnourished.Buttwonewstudies
随机试题
关于姚鼐,下列说法中正确的有()
财产物资的盘盈是指()。
数控机床由()组成。
关于《集成电路布图设计保护条例》的规定内容,下列选项错误的是()。
开始采购认证时间=()。
在法学理论上,划分法律部门的首要标准是()。
简述学习动机的作用。
利用【 】,用户不需要了解标准的EDI文件格式,EDI翻译程序也不需要知道用户的文件格式。
在Excel中,公式总是以()开始。
高三那年的一个周末,母亲第一次搭别人的车来到县城的一中,给我带来一盒营养液。母亲说:“听人家说,这东西补脑子,喝了它,准能考上大学。”我嘟囔着:“那么贵,又借钱了吧?”母亲一笑:“没有!是用手镯换的。”那只漂亮的银手镯是外祖母传给母亲的,是贫穷的母亲最贵重
最新回复
(
0
)