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
49
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、blind people cannot tell their brain when there was more light.
B、the level of melatonin does not change in blind people’s blood.
C、facing light, the level of melatonin in blind people will increase.
D、not all the blind people have sensibility to light.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3782453.html
相关试题推荐
Thenewsismainlyabout______.[br][originaltext]Chinesestatemediasa
Howlongwillthetwinsremainonlifesupportmachines?[originaltext]Doct
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
ThepennameMarkTwaincamefrom_____[br][originaltext]NoauthorinAme
WhereistheWestPointlocated?[br][originaltext]WestPointisacollege
WhereistheWestPointlocated?[originaltext]WestPointisacollegeforf
Whatistheconversationmainlyabout?[br][originaltext]W:Gosh!Kevin,arey
Inordertolivealongerlife,whatshouldpeopledo?[br][originaltext]M:He
Whatweretheprisonerandhiswifeaccusedof?[br][originaltext]Astate
随机试题
Itusedtobethatifyouwantedtotravel,youhadtoplanforalongbuso
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeach
Completethesentencesbelow.ChooseNOMORETHANTWOWORDSfromthepassagefor
Atsometimeinyourlifeyoumayhaveastrongdesiretodosomethingstrang
干式系统喷头开启后管道排气充水后出水,效率高于湿式系统。
客户信息可以分为定量信息和定性信息,按照”定量信息—定性信息”的对应关系,以下对
钢筋下料后应按()分别挂牌标明。A、品种 B、种类 C、规格 D、
某市基本养老保险企业缴费费率为19%,个人为7%;医疗保险企业缴费费率为10%,
我国银行间债券市场的现券交易品种目前有()。 A.国债和公司债B.国债和可
下列哪一种喹诺酮类药是泌尿系统感染的首选药A、诺氟沙星 B、环丙沙星 C、依
最新回复
(
0
)