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
外语
Many adults may think they are getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to
Many adults may think they are getting enough shut-eye, but in a major sleep study almost 80 percent of respondents admitted to
admin
2013-03-27
55
问题
Many adults may think they are 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. So, what exactly is the right amount of sleep? Research shows that adults need an average of seven to nine hours of sleep a night for optimal functionality. Read on to see just how much of an impact moderate sleep deprivation can have on your mind and body.
By getting less than six hours of sleep a night, you could be putting yourself at risk of high blood pressure. When you sleep, your heart gets a break and is able to slow 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 sleeps. 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.
We all hang around in bed during our bouts of illness. But did you know that skipping out on the bed rest can increase your risk of getting sick? 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. So try to toughen up your immune system by getting at least seven hours of sleep a night, and maintaining a healthy diet. You’ll be glad you got that extra hour of sleep the next time that bug comes around and leaves everyone else bedridden with a fever for three days.
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 REM 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. Most people experience this eerie phenomena at least once in their lives, but those who are sleep deprived are more likely to have panicked episodes of sleep paralysis that are usually accompanied by hallucinations, as well.
For a second, imagine all of your memories are erased; every birthday, summer vacation, even what you did yesterday afternoon is completely lost, because you have no recollection of them. It’s a chilling thought, but that is what a life without sleep would be like. Sleep is essential to the cognitive functions of the 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 to that they can be easily organized and stored in the mind’s long-term cache.
What effects of sleep deprivation on human mind and body are discussed in this passage?
选项
A、High blood pressure, a toughened immune system, sleep paralysis, and memory loss.
B、Blood pressure, immune system, sleep paralysis, and long-term memory.
C、Blood pressure, immune system, the brain and the body, and memory.
D、High blood pressure, a weakened immune system, sleep paralysis, and memory loss.
答案
D
解析
本题考查概括能力。第二段最后一句提到睡眠不足会导致血压升高;第三段中间提到睡眠不足与免疫功能下降有关;第四段主要讨论睡眠瘫痪;最后一段主要讲睡眠不足使记忆丢失。概括全文,D项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/V3mO777K
0
考博英语
相关试题推荐
Probablyoneofthemostrevolutionaryinnovationsinscienceduringthiscenturywastherecognitionofthedualityofmatter;【
Ithasbeenarguedthatwhereschoolsbecomebureaucratized,theybecomeboundupwiththetechniquesandimplementationofthe
Althoughsolutionstoaproblemareoftenthe.fruitofdirectinvestmentsintargetedresearch,themostrevolutionarysolution
Atallageandatallstagesoflife,fearpresentsaproblemtoalmosteveryone."Wearelargelytheplaythingsofourfears,"
"ItwasthebeginningofarevolutioninAmericaandtheworld,arevolutionthatsomehaveyettoacknowledgeandmanyhaveyet
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,ofcourse,thatthechimpanzeehasnotdevelopedthe
Oneofthemajordifferencesbetweenmanandhisclosestlivingrelativeis,ofcourse,thatthechimpanzeehasnotdevelopedthe
Theroleofgovernmentinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresour
Whenaninventionismade,theinventorhasthreepossible【41】ofactionopentohim:hecangivetheinventiontotheworldbyp
StandardEnglishisthevarietyofEnglishwhichisusuallyusedinprintandwhichisnormallytaughtinschoolsandtonon-nat
随机试题
WhatMakesaSoccerPlayerGreat?Soccerisplayedbymillionsofpeopleallovertheworld,buttherehaveonlybeenfewpl
下列哪类变性损伤程度最轻。()
患者,女性,40岁。诊断细菌性痢疾,入院第一天,护士在采集病史过程中,与患者沟通的描述,不正确的是
高钾血症是指血清钾高于
A.强心苷B.甾体皂苷C.蒽醌苷D.黄酮苷E.三萜皂苷麦冬中的皂苷是
某施工单位在混凝土搅拌场处私设排污口,将生产过程中产生的废水直接排入水沟,经水沟进入稻田,形成了板结,使村里几十亩水稻受损严重。市环保局责令该施工单位限期改正,限期拆除私自设置的排污口,并对该施工单位处以一定数额的罚款,该额度是()。
“十年树木,百年树人”,这句话反映了教师劳动具有()
以售后回购方式销售商品,企业在会计核算上一般不将其确认为收入。这一做法所遵循的会计核算的一般原则是()。
SmokingCanIncreaseDepressiveSymptomsinTeensWhilesometeenagersmaypuffoncigarettesto"self-medicate"againstt
情景:你叔叔的美国朋友Howell先生正在中国旅游。任务:请你用英语给Howell先生写一封50个词左右的电子邮件。内容包括:自我介绍;约他见面;见面的目的。电子邮件写在答题卡2上该题的序号后。请用下面格式。DearMr.Howell
最新回复
(
0
)