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
2015-10-07
16
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 attack - this is the case for all animals, whether they are reptiles, 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 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 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 micro-naps.
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 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 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 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 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, 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 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
attack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/o7AO777K
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
Howimportantisexercise?
Describeaworkofartthatyouhaveseen.Youshouldsay:whenandwhereyousawitwhatitlookedlikewhatyouthoughtthisw
Whatkindsofsubjectsdostudentsstudyinhighschool?
WRITINGTASK2Youshouldspendabout40minutesonthistask.Writeaboutthefollowingtopic:Increasedmeasuresh
Writeaboutthefollowingtopic:Somepeoplebelievethatnationalsportsteamsandindividualmenandwomenwhorepresentt
Youshouldspendabout20minutesonthistask.Thebargraphgivesinformationaboutthenumberoflibrarybooksborrowedf
Youshouldspendabout20minutesonthistask.ThechartsbelowshowthenumberofJapanesetouriststravellingabroadbetween
Youshouldspendabout20minutesonthistask.Thechartbelowshowsthetotalnumberofminutes(inbillions)oftelephonecal
Havingfinishedyourfinalexams,youhavegonestraighthomewithoutsayinggoodbyetoyourroommate.Writealettertohim
Manypeoplebelievethatzoosshouldbeclosedbecauseitiscrueltokeepanimalslockedup.Moreover,zoosdonotplayaposit
随机试题
气焊时焊炬和焊丝的运走方向同时都从左到右称____,同时都从右到左称____。
西方国家为加强环境管理而采用的一种卓有成效的行政管理制度是()。
在司汤达的《红与黑》第30章中,于连再次征服德.雷纳尔夫人的过程,其实是他()
A、腹内斜肌,腹横肌的弓状下缘B、腹股沟韧带和腔隙韧带C、腹外斜肌腱膜D、腹膜、腹横筋膜和联合肌腱E、腹内斜肌和联合肌健构成腹股沟管的下壁_______。
严重创伤后需要及时处理的代谢改变是
道氏理论认为,在下列所有价格中最重要的是( )。
广告置换是指媒体与媒体之间,以资源共享为基础,以自愿的效用最大化为目的,满足双方需求实现共赢的等值交换。根据上述定义,下列属于广告置换的是:
关系数据库管理系统应能实现的专门的关系运算包括
层次型、网状型和关系型数据库划分原则是
TVGamesShowsOneofthemostfascinatingthingsabouttelevisionisthesizeoftheaudience.Anovelcanbeonthe"best
最新回复
(
0
)