首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Complete the notes below. Write NO MORE THAN TWO WORDS for each answer. The role of sleep in humans and animals Importance of sl
Complete the notes below. Write NO MORE THAN TWO WORDS for each answer. The role of sleep in humans and animals Importance of sl
admin
2017-04-27
42
问题
Complete the notes below.
Write NO MORE THAN TWO WORDS for each answer.
The role of sleep in humans and animals
Importance of sleep in animals
Compared to those without food, animals without sleep are more likely to suffer from【L31】______
Sleep is necessary for all animals, whether they are reptiles,【L32】______or fish.
Differences in animals’ sleep and reasons for their ways of resting
Dolphins
swim to the surface when sleeping, because they need to【L33】______
Birds
are constantly【L34】______in the presence of numerous predators.
Horses
do most of their sleeping standing up.
do occasionally take short naps lying down. Lying in one position for a long time could well injure a horse, because their【L35】______are delicate.
Potential problems encountering
Animals can also have【L36】______, the same as humans. Importance of sleep in humans
It helps us to organise our【L37】______of the day.
It plays a key role in【L38】______.
e.g. Because of the similar sleeping pattern to that in humans,【L39】______ are studied in order to increase our knowledge of human physiology.
Scientists choose to study the【L40】______of the fruit fly in order to know the function of the human gene and understand developmental processes in humans.
【L31】
Good morning, everyone. In today’s lecture, I’m going to talk about the role of sleep in humans and animals. Of all the biological processes in the animal kingdom, sleep is perhaps the most important. A human can survive for almost two weeks without eating, but did you know that one week without sleep can be fatal? It’s even worse for animals, especially for those who must avoid predators. Without sleep, an animal is much less capable of avoiding an [31]attack - this is the case for all animals, whether they are reptiles, [32]mammals or fish. Let us look now at how different animals sleep, reasons for their ways of rest, and the potential problems they might encounter.
In marine life, sleep must be balanced with breathing. For example, the dolphin must float to the surface as it sleeps in order to [33]breathe. Like other large sea mammals, they keep one eye open and one half of the brain awake at all times to maintain some amount of consciousness required to breathe and to watch out for possible threats. They sleep with only one brain hemisphere in slow-wave sleep.
Birds also have unusual sleeping patterns, mostly due to being constantly on [34]edge in the presence of numerous predators. They usually sleep quite lightly -for example, Swainson’s Thrush, also called Olive-backed Thrush, is a medium-sized thrush that takes hundreds of naps during the day, each of which lasts just a few seconds. While migrating, migratory birds tend to function well on micronaps.
Horses, on the other hand, do most of their sleeping standing up. Scientists think that horses develop their habit of sleeping upright as a defense mechanism, a way of protecting themselves against predators, and a standing position keeps a horse in a constant state of readiness to race away if danger should approach.
Also, horses do occasionally take short naps lying down. Horses are heavy animals with big muscles, but their [35]bones are surprisingly delicate, so lying in one position for a long time could well injure a horse.
Just like humans, animals can also have [36]sleeping problems. Dr. John Hedricks and Adrian Morrison from the School of Veterinary Medicine, University of Pennsylvania in Philadelphia, determined that certain diseases were primarily associated with the sleep states in animals. In their research they emphasised that because so much in this area still remains unclear, animal models were very important for studies of sleep disorders. The physiology of sleep in animals is similar to that of humans.
But why do we humans sleep? Researchers and scientists believe it helps us organise our [37]memories of the day - that sleep acts as a kind of filing system for the brain. Without it, our thoughts become disorderly and confused, which leads to increased likelihood of accidents and a tendency to say and do bizarre things. Researchers also believe that sleep plays a key role in [38]learning. We sleep so that the brain can integrate new knowledge and form new associations. Because of the similar sleeping pattern to that of humans, [39]rats are often studied in order to increase our knowledge of human physiology. In one study, rats were kept awake for almost two weeks, and their behavior was observed. Researchers found the sleep-deprived rats could hardly remember anything of what they had been taught that day. For example, one rat had been taught to recognise pictures of various Parisian landmarks in order to receive food - pressing a button below a picture of the Louvre would result in food being released and so forth. However, when deprived of sleep, they would press buttons seemingly at random.
In addition to rats, the fruit fly, a small insect that feeds and breeds on spoiled fruit, also has been used as a model organism and thousands of scientists around the world work on it. But why was the fruit fly chosen to be studied? It was for practical reasons. The most important one is that the relationship between fly and human genes is so close that the sequences of newly discovered human genes, including genes that show a susceptibility, can often be matched against their fly counterparts. This provides an indication of the function of the human gene and could help in the development of effective drugs to help people with sleeping disorders. Therefore, many scientists today choose to study the [40]genetic structure of the fruit fly, which could make a particularly important contribution to the understanding of developmental processes in humans.
In conclusion, sleep is a necessary part of life not just for humans, but for the entire animal kingdom. Now, I’d be happy to answer any questions you may have...
选项
答案
attack
解析
作为大纲填空题的第一题,定位上略难,整篇文章都在比较人类和动物的睡眠,所以sleep不能作为有效的定位词。但这里拿“进食”和sleep作对比,是不错的提示。当录音出现without sleep时,则需重点听后续内容,此题填名词attack。
转载请注明原文地址:https://kaotiyun.com/show/CG8O777K
本试题收录于:
雅思听力题库雅思(IELTS)分类
0
雅思听力
雅思(IELTS)
相关试题推荐
WRITINGTASK1Youshouldspendabout20minutesonthistask.Theflowchartbelowshowstheprocessinvolvedinwriting
Youshouldspendabout20minutesonthistask.Thetwomapsbelowshowanisland,beforeandaftertheconstructionofsometou
Youshouldspendabout40minutesonthistask.Writeaboutthefollowingtopic:Someemployersrewardmembersofstaffforthei
Somepeoplearereluctanttosharetheirknow-howbecausetheyareafraidthattheirknowledgeandintellectualpropertiescanb
ThechartbelowcontainsinformationprovidedbyAustralia’stertiaryinstitutionsaboutthepercentageofmaleandfemalestude
Insteadofaskingthegovernmenttobearthecostofhighereducation,studentsshouldpaytuitionfeesthemselves.Doyouagree
Questions27-30Foreachquestion,onlyONEofthechoicesiscorrect.Writethecorrespondingletterintheappropriateboxon
READINGPASSAGE3Youshouldspendabout20minutesonQuestions27-40,whicharebasedonReadingPassage3below.
Questions15-17ChoosetheappropriatelettersA-Dandwritetheminboxes15-17onyouranswersheet.*
Questions15-17ChoosetheappropriatelettersA-Dandwritetheminboxes15-17onyouranswersheet.*
随机试题
下列选项中,不属于人力资源需求预测方法中定量的统计学方法的是()。
对犯罪嫌疑人逮捕后的侦查羁押期限不得超过
设函数f(x)在[0,1]上连续,并且对于[0,1]上的任意x所对应的函数值f(x)均为0≤f(x)≤1,证明:在[0,1]上至少存在一点ξ,使得f(ξ)=ξ.
患者,男,28岁。因左锁骨上窝淋巴结肿大2个月来诊。淋巴结病理为霍奇金淋巴瘤,结节硬化型。胸片示纵隔不宽,余检查均正常。患者最佳的治疗方案为
A、湖南、湖北、贵州、云南B、江西、湖南、广西C、湖北D、湖南、贵州、四川、广西E、吉林、黑龙江信石的主产地是()
S公司为发动机研发企业,占地100000m2,有员工350人,其中专职安全管理人员2人。2018年S公司新建发动机试验技术中心,该中心由主功能区和辅助区组成。主功能区建筑面积20000m2,建筑高度13.75m;辅助区建筑面积10000m2,建筑高度5m,
企业在估算初始现金流量和终结现金流量时,均要考虑()的变化。
为了收集犯罪证据、查获犯罪人,对犯罪嫌疑人以及可能隐藏罪犯或者犯罪证据的人的身体、物品、住处和其他有关的地方进行的搜索、检查,称为()。
恒心毅力
Youlookverywellafteryourholiday;youhave______weight.
最新回复
(
0
)