首页
登录
职称英语
Sleep is part of a person’ s daily activity cycle. There are several differe
Sleep is part of a person’ s daily activity cycle. There are several differe
游客
2023-07-18
34
管理
问题
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 (安睡) , your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing were 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, hut 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 (眼皮) 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. [br] One of the features of REM sleep is that______.
选项
A、there are large slow waves, though rapid for the first few minutes
B、you have the deepest sleep
C、there are no brain waves
D、the brain waves are a little last and the brain becomes a little active
答案
D
解析
从第二段第一、二句可知大脑运动水平会再度略有提高,而delta波消失,取代的是脑电波运动图形。据此可知脑电波变得快了一点,大脑活跃些。而大的缓波和睡得最深是stage 4 sleep的特征,rapid for the first few minutes 是 stage 1 sleep的特征,整个睡眠阶段都是有脑电波的,故A,B和C皆错。
转载请注明原文地址:https://tihaiku.com/zcyy/2847881.html
相关试题推荐
[originaltext]Afewdegreescanmakeabigdifferencewhenitcomestofood
[originaltext]Afewdegreescanmakeabigdifferencewhenitcomestofood
Housingofficialssaythatlatelytheyarenoticingsomethingdifferent:stu
Housingofficialssaythatlatelytheyarenoticingsomethingdifferent:stu
[originaltext]Therearedifferentwaystostorefish.Twowaystokeepfish
[originaltext]WeexperiencedifferentformsoftheSun’senergyeveryday.
[originaltext]WeexperiencedifferentformsoftheSun’senergyeveryday.
[originaltext]WeexperiencedifferentformsoftheSun’senergyeveryday.
Severaldayspassedbeforethosewell-knownexperts______(想出解决问题的办法).cameupwit
Whatisthemainideaofthepassage?[br]Differentfrommostfishes,shark’sb
随机试题
WhatisCulture?Culture,inanthropology(人类学),the
A、Tworooms.B、Threerooms.C、Fiverooms.D、Sixrooms.C问题问的是男士订了几个房间。根据男士所说Two
Awisemanoncesaidthattheonlythingnecessaryforthetriumphofevi
小学音乐《大家一起来》主要教学过程及板书设计 (一)教学过程 1.导入新课 欣赏孙悦演唱《大家一起来》视频,导入新课教学。 2.学唱歌曲 (1)初听
基金信息披露的最根本、最重要的原则是( )原则。A.时效性 B.重要性 C
人们看到别人处于紧急状态情境中而不去救援,不是由于人性的丧失,而是由于其他人在场
这种基于网络的信息流却有着自身的致命缺陷,那就是确保信息的真实性存在难度。由于缺
在无地基失效情况下,下列关于场地与建筑物震害关系的说法正确的是()。A.在覆
防火防爆安全装置分为阻火隔爆装置和防爆卸压装置两大类。下列关于阻火器类型的说法中
下述关于二尖瓣关闭不全患者早期病理生理改变的叙述,正确的是A.左心房压力负荷增加
最新回复
(
0
)