首页
登录
职称英语
According to the experiments, many blind people________. [br] [originaltext]
According to the experiments, many blind people________. [br] [originaltext]
游客
2023-11-12
84
管理
问题
According to the experiments, many blind people________. [br]
Did you ever wonder why it is that most people are"programmed" to sleep at night instead of during the day? If there’s something about the cycle of light and dark that’s telling us when to sleep, then shouldn’t the sleep cycle of a blind person be different? (14)It turns out that many blind people do have the same sleep cycle as sighted people. How can this happen? The answer is: hormones—one hormone called melatonin in particular. (15)In sighted people, the level of melatonin goes up at night or when it’s dark and goes down in the day or when it’s light. It’s believed that it’s the presence of this hormone in the blood that gives us the urge to sleep. If an increase in melatonin level "programs" sighted people to sleep at night, then what about blind people? A researcher named Dr. Charles Czeisler tells about an interesting experiment. He tried shining a bright light into the eyes of some blind people. (16) When he did this, he noticed that the level of the melatonin in the blood of these subjects went down—just as it would do for sighted people. Somehow, the eyes of these subjects, even though they were damaged and had no visual perception of light, could tell their brain when there was more or less light. However, this doesn’t work for all blind people. Further research may be able to explain this sensitivity to light in terms of the type of blindness of the subject.
选项
A、A decrease in melatonin level.
B、An increase in melatonin level.
C、Personal habits.
D、Psychological hint.
答案
B
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3181781.html
相关试题推荐
Accordingtothenewsitemthevolcanohadbeendormantforabout______.[origi
Whichstorytakesthelongesttotell?[originaltext]Thehumorousstorymay
JamesJoyce’snovels_______.[br][originaltext]JamesJoyce’snovelsflout
Whatarethetwospeakerstalkingabout?[br][originaltext]W:SothisistheI
Whatarethetwospeakerstalkingabout?[br][originaltext]W:SothisistheI
Whatarethetwospeakerstalkingabout?[originaltext]W:SothisistheInterne
Accordingtotheelectriccompanyofficials,theprojectisexpectedtobecompl
Accordingtotheelectriccompanyofficials,theprojectisexpectedtobecompl
Whatisthenewsitemmainlyabout?[br][originaltext]AmericanforcesinA
Whatisthenewsitemmainlyabout?[originaltext]AmericanforcesinAfghani
随机试题
Bakingbooksbyprofessionalfoodwriterstendtobemoremodest______.A、enchant
TheclashesinNigeriawerebetween______.[br][originaltext](l)Morethan
TheGulfBetweenCollegeStudentsandLibrariansA)Student
A.0 B.-1 C.-3 D.-5
2014年,某区限额以上第三产业单位共674家,实现收入1059.1亿元,同比增
下列有关单克隆丙种球蛋白病发病特点的叙述中,不正确的是A:疾病的突出特点是血清中
共用题干 DomesticViolenceNearlythreein1
下列时间GDP同比增长快慢排序正确的是:A.2017年上半年>2018年
运动员体育津贴属于( )。A.计时工资 B.计件工资 C.津贴和补贴 D
最能体现信动态性变化特征,并且在工程价格的市场机制中起重要作用的工程造价信息主要
最新回复
(
0
)