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
Sleep Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in c
Sleep Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in c
admin
2011-01-05
43
问题
Sleep
Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. When you first drift off into slumber, your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing will slow and become quite regular. Your brain waves slow down a bit too, with the alpha rhythm of rather fast waves predominating for the first few minutes. This is called stage 1 sleep. For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. The lower your stage of sleep, the slower your brain waves will be. Then about 40 to 60 minutes after you lose consciousness you will have reached the deepest sleep of all. Your brain waves will show the large slow waves that are known as the delta rhythm. This is stage 4 sleep. You do not remain at this deep fourth stage all night long, but instead about 80 minutes after you fall into slumber, your brain activity level will increase again slightly. The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids as if you were looking at something occurring in front of you. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep. It is during REM sleep period, your body will soon relax again, your breathing will grow slow and regular once more, and you will slip gently back from stage 1 to stage 4 sleep-only to rise once again to the surface of near consciousness some 80 minutes later.
Every stage of sleep occur in cycles.
选项
A、Right
B、Wrong
C、Not mentioned
答案
A
解析
从第二句话我们知道人的睡眠分几个阶段,而这些阶段也是循环发生的。因此本句表述是正确的。
转载请注明原文地址:https://kaotiyun.com/show/nemd777K
本试题收录于:
职称英语卫生类A级题库职称英语分类
0
职称英语卫生类A级
职称英语
相关试题推荐
WILLIAMTHEHERO!BraveWilliamBaldock,whoissixyearsold,isaheroafterhelpinghismotherwhenshefelldownstairs
Youwillhearsomeinformationaboutavisitortoaschool.Listenandcompletequestions21-25.Youwillheartheinformationt
Youwillhearsomeinformationaboutavisitortoaschool.Listenandcompletequestions21-25.Youwillheartheinformationt
ListentoSarahtalkingtoafriendaboutherholidayphotographs.Whatplaceiseachpersonin?Forquestions6-10,writealet
ListentoSarahtalkingtoafriendaboutherholidayphotographs.Whatplaceiseachpersonin?Forquestions6-10,writealet
Abouttwentyyearsago,allimportantresourcesinourcountrywereallocatedbythecentralgovernment.
DriedFoodsCenturiesago,mandiscoveredthatremovingmoisture(51)foodhelpedtopreserveit,andthattheeasiestwaytod
DriedFoodsCenturiesago,mandiscoveredthatremovingmoisture(51)foodhelpedtopreserveit,andthattheeasiestwaytod
ThepoetWilliamCarlosWilliamswasaNewJerseyphysician.
AWhattheFCTCDemandsBUSSigningoftheFCTCCOppositiontotheFCTCDHowtheFCTCCameintoBeingEWhattheFCTCWi
随机试题
依据国际惯例,在仲裁协议未作法律适用规定的情况下,仲裁庭适用______。
下列哪项是渗出液形成的主要原因
A.面色白B.面色黄C.面色青D.面色红E.面色苍黄
甲、乙是同事,因工作争执甲对乙不满,写了一份丑化乙的短文发布在丙网站。乙发现后要求丙删除,丙不予理会,致使乙遭受的损害扩大。关于扩大损害部分的责任承担,下列哪一说法是正确的?(2010年卷三23题。单选)
除法律有特别规定的情形之外,下列应当适用保护原则确立中国刑法适用效力的是哪一选项?
把城市设计理论归纳成为路径、边界、场地、节点、标志物五元素的学者是:
辛亥革命是资产阶级领导的以反对君主专制制度、建立资产阶级共和国为目的的革命,是一次比较完全意义上的资产阶级民主革命。它的伟大历史意义表现在()
某系统结构图如下图所示(图中n≥5)该系统结构图的宽度是()。
T:Goodmorning/afternoon.Wouldyoupleasegivemeyourmarksheets,please?ThisisMr/Miss-"He/Shewilljustlistenttous.(p
Vacation(休假)timecanbeassimpleasjusttimeawayfromwork.Youmayjustwantto【C1】______homeanddonothing.Thereisnothi
最新回复
(
0
)