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
2024-10-11
27
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:https://tihaiku.com/zcyy/3796345.html
相关试题推荐
Alargenumberoflocalpeopleareanxiousaboutthe______impactthatthemotorw
I’mdyingtogohome—adesire______toallpeoplewhotravelunwillingly.A、part
So______thateventhepeopleinthenextroomcouldhearhim.A、loudlyhespokeB
Foryoungpeople,Carpenteris______singer.A、mosttheirpopularB、mostpopularo
Twopeoplehadmetthegeneralbefore,but______recognizedhim.A、eitherB、neithe
TheyweretheBoyScouts______tohelpelderlypeoplecrossthestreet.A、whoseta
Howlongdoesittaketocovertheworkbookmaterial?[originaltext]Beforew
Accordingtothepassage,asurveyaboutbutterfliesiscarriedonby________.[
Amotelisusuallyforpeoplewho________.[br][originaltext]Englishspeak
What’sHarold’sinterestwhilehe’spractisinglaw?[br][originaltext]W:Hi,H
随机试题
[originaltext]Wherearethestamps?(A)Thepostofficeisclosed.(B)Thestamps
Handsomemenandwomenoftenappeartobeblessedwithluckylives.Nowrese
[originaltext]AnInterviewwithanActressInterviewer:
用滚动预算数据作为考核的企业,其出发点是基于预算目标做的不现实。无法正常发挥考核
计算外墙工程量时,外墙的长度应以()为准。A.外墙轴线 B.外墙中心线
学习方式与学习方法之间的关系正确的是( )。A.类似战略与战术的关系 B.学
以下药品配制的试液,最应该保存在聚乙烯塑料瓶中的是A:硫酸 B:硝酸银 C:
根据企业破产法律制度的规定,在人民法院受理破产申请前6个月内,债务人出现破产原因
作业成本法下,产品成本计算的基本程序可以表示为()。A.资源—作业一成本对象
男性,65岁。急性下壁心肌梗死第2天,心电监测示二度Ⅰ型房室传导阻滞,心室率50
最新回复
(
0
)