首页
登录
职称英语
All mammals require sleep; it is an essential part of life. For giraffes,
All mammals require sleep; it is an essential part of life. For giraffes,
游客
2024-01-11
78
管理
问题
All mammals require sleep; it is an essential part of life. For giraffes, two hours a
Line day is enough. For bats, that number is closer to twenty. The average adult human
needs between seven and nine hours of sleep every day. Despite these differences,
mammals all have one thing in common: If they do not get enough sleep, they can
(5) suffer serious mental and physical consequences.
The most extensive sleep research has been conducted on people. Through
these studies, scientists have identified two broad categories of sleep, which can
be further divided into five stages with distinct physiological functions. Taken
together, they form a complete sleep cycle. The first four stages are marked by a
(30) lack of rapid eye movement (REM). Therefore, they are referred to as non-REM
sleep. While people are engaged in non-REM sleep, several things are occurring.
Researchers have discovered that during this early sleep, the human body
releases a series of hormones responsible for the proper functioning of certain
body systems. Disrupted sleep can cause these hormones to fall out of balance.
(15) The results can contribute to disorders such as diabetes, depression, infertility,
or even cancer. Lack of sleep, especially in stages 3 and 4, can literally stunt the
growth of children and may increase rates of obesity in adults.
Stage 5 sleep is defined by the occurrence of rapid eye movement, otherwise
known as dreaming. Note that, while REM sleep is the final stage in a sleep cycle,
(20) a complete cycle generally lasts only about 95 minutes. A person will experience
four to six cycles in one sleep session, with REM sleep taking up a larger portion
of the cycle as the night continues. Scientists have advanced several theories
about why humans need REM sleep. One view is that dreaming aids in memory
consolidation. Under this theory, during REM sleep the brain not only strengthens
(25) memory of important actions or events, but it weakens memory of unimportant
things. Another view is that dreaming is necessary for proper central nervous
system development. Yet another theory suggests that REM sleep involves the
repair of monoamine receptors. The theories are not necessarily exclusive; in fact,
they all reach the conclusion that REM sleep deprivation can result in death. [br] The passage suggests that the author would be most likely to agree with which of the following statements?
选项
A、A typical person needs more than six sleep cycles to maintain optimal health.
B、REM sleep is more important than non-REM sleep.
C、A typical person experiences more REM sleep at the end of the night.
D、Lack of sleep can stunt the growth of adults.
E、The majority of sleep disorders occur in children.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3352468.html
相关试题推荐
Transgenicmammalsthatsecretemonoclonalsintheirmilkcangenerateonegram
A、The"slingeffect"remainsunprovenandrequiresexperimentalcorroboration.B
CAVIL:CRITICIZE::A、chafe:scrubB、entice:lureC、mandate:requireD、inundate:delu
Theprocessofnuclearfission______requirestheuseofareactorcore,aroundw
Inthecanonicalwritingoftheculturalessentialists,languagehas
Inthecanonicalwritingoftheculturalessentialists,languagehas
CIRCUMVENTION:A、directspeechB、requirementC、directmeetingD、withoutconcentra
Allmammalsrequiresleep;itisanessentialpartoflife.Forgiraffes,
Allmammalsrequiresleep;itisanessentialpartoflife.Forgiraffes,
Allmammalsrequiresleep;itisanessentialpartoflife.Forgiraffes,
随机试题
Thisbookwillshowthereaders_____canbeusedinothercontexts.A、howthatthe
[originaltext]Mr.Jones:Whatmaterialswereusedforroadsurfacesduringthe
题干参考上题,b.若需得到每种产品的名称和该产品的总库存量,则对应的查询语句为:
10个月婴儿,腹泻3天,大便呈黄绿色蛋花汤样,未经治疗,日渐加重,患儿嗜睡,前囟
肺癌常见的临床症状不包括()A.胸痛 B.咳嗽 C.血痰 D.声
舌苔由薄白转为白厚,提示A.病邪入里B.寒邪化热C.邪退正复D.热退津复E.湿热
近年来,由于建筑用砂需求激增,黄砂价格居高不下,盗采江砂成为一些不法分子的暴富捷
属于过敏反应表现的是A.皮疹 B.药热 C.黏膜水肿 D.哮喘 E.荨麻
成批轮番生产企业和单件小批量生产企业的期量标准中,相同的有()A.生产间隔期
下列工程量中,监理人应予计量的有( )。A.由于工程量清单缺项增加的工程量 B
最新回复
(
0
)