首页
登录
职称英语
According to the experiments, many blind people [br] [originaltext] Did you
According to the experiments, many blind people [br] [originaltext] Did you
游客
2024-10-01
52
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/3782452.html
相关试题推荐
Thenewsismainlyabout______.[br][originaltext]Chinesestatemediasa
Thenewsismainlyabout______.[originaltext]Chinesestatemediasaythat
WhatcanbelearntonU.S.-Vietnameserelations?[originaltext]TheVietna
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
WhereistheWestPointlocated?[br][originaltext]WestPointisacollege
Whatistheconversationmainlyabout?[br][originaltext]W:Gosh!Kevin,arey
Whatistheconversationmainlyabout?[originaltext]W:Gosh!Kevin,areyouOK?
Whatweretheprisonerandhiswifeaccusedof?[br][originaltext]Astate
随机试题
TheArtofListeningI.Inthelastlecture,Communicationcompetence:
A(n)______jobisonethatislongandboring.A、dullB、tediousC、tiresomeD、mon
TheU.S.governmentisaskingAmericanstoeatlessandexercisemoreinan
Usingacomputerorsmartphoneatnightcancauseustopileonthepounds,
Howcouldyourneighbourhoodbeimproved? Well,becausethisisanewly-builtr
Didyouknowthatinfantsprefertheirmothers’voicestothatofotherfema
儿茶的来源是()。A.茜草科植物儿茶的带叶嫩枝的干燥煎膏B.茜草科植物儿茶的枝
游离黄酮类化合物中,在水中溶解度最小的是A:二氢黄酮B:黄酮C:异黄酮D:
有一个小孩,在上中学时,父母曾为他选择文学这条路。只上了一学期,老师就在他的评语
为建设美丽中国和环境友好型社会,我国部分城市正在试行生活垃圾分类,下列选项中不属
最新回复
(
0
)