首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
金融经济
Modern scientists divide the process of dying into two stages--clinical or te...
Modern scientists divide the process of dying into two stages--clinical or te...
admin
2020-12-24
45
问题
Modern scientists divide the process of dying into two stages--clinical or temporary death and biological death. Clinical death occurs when the vital organs, such as the heart or lungs, have ceased to function, but have not suffered permanent damage. The organism can still be revived. Biological death occurs when changes in the organism lead to the disintegration of vital cells and tissues. Death is then irreversible and final.
Scientists have been seeking a way to prolong the period of clinical death so that the organism can be revived before biological death occurs. The best method developed so far involves cooling of the organism, combined with narcotic sleep. By slowing down the body's metabolism, cooling delays the processes leading to biological death.
To illustrate how this works, scientists performed an experiment on a six-year-old female monkey called Keta. The scientists put Keta to sleep with a narcotic. Then they surrounded her body with ice-bags and began checking her body temperature. When it had dropped to 28 degrees the scientists began draining blood from its body. The monkey's blood pressure decreased and an hour later both the heart and breathing stopped; clinical death set in. For twenty minutes Keta remained in this state. Her temperature dropped to 22 degrees. At this point the scientists pumped blood into its body in the direction of the heart and started artificial breathing. After two minutes the monkey's heart became active once more. After fifteen minutes, spontaneous breathing began, and after four hours Keta opened her eyes and lifted her head. After six hours, when the scientists tried to give her a penicillin injection, Keta seized the syringe and ran with it around the room. Her behavior differed little from that of a healthy animal.
This passage focuses on ______
选项
A.the difference between biological and clinical death
B.the process of dying
C.prolonging the period of clinical death
D.the nature of clinical death
答案
C
解析
此题考查全文主旨。本文第一段介绍了死亡的两个过程——临床死亡和生物死亡,以及各自的特征。第二段讲述科学家在寻找方法尽量在生物死亡到来之前延长临床死亡,结果发现最好的办法就是冷冻法.以及冷冻法延长临床死亡的机理。第三段详细介绍一个实验.冷冻法如何延长临床死亡以使机体恢复生机。由此可知全文的焦点是如何延长临床死亡,答案为C。
转载请注明原文地址:https://ti.zuoweng.com/ti/6yR8KKKQ
相关试题推荐
根据下列内容,回答181-185题。 Modemscientistsdividetheprocessofdyingintotwosta...
ItisreportedthatsomescientistsintheUnitedStateshavefoundanew___...
Workersmaintainthatthecompany's__________toimplementmodernsafetyreg...
Whenthecopyingprocessis__________,asmall"Done"windowappearsonth...A.
Modernscientistsdividetheprocessofdyingintotwostages--clinicalorte...
Modernscientistsdividetheprocessofdyingintotwostages--clinicalorte...
WhatisNOTmentionedasapartofthechocolateproductionprocessinValbonne?
[完型填空] Manypeoplewouldagreethatstressisamajorprobleminmodern...
Modernlifeisimpossiblewithouttraveling.Thefastestwayoftravelingis...
Modernlifeisimpossiblewithouttraveling.Thefastestwayoftravelingis...
随机试题
最适合档案害虫繁殖的温度为()。 A.6℃~10℃ B.8℃~20℃ C.
当预测通货膨胀率趋高时,投资者往往会要求提高期望投资回报率以抵消通货膨胀的影响。
肝硬化病人应进食菜泥、肉末等软食,避免油炸、粗纤维食物,其原因是
理财规划书要做到内容专业、科学,形式规范、标准。()
经过50多年的发展,我国台湾地区资本市场建立起由“证券交易所集中市场—上柜市场—
D
当消费者处于均衡状态时,()。 A.消费者在既定收入和商品价格下得到了最大满
患者,男性,21岁,7岁开始左面颊部肿胀畸形,表面皮肤可见咖啡色斑。检查见左、右面部不对称,左面颊可扪及多发性结节,质软,皮肤松弛下垂,面部、胸部与背部可...
王某于某日清晨使用月票在市公园内露天舞池旁学习跳舞时,突然被旁边一棵树上坠落的枯枝砸在后头颈上,随即被他人送到医院诊治。诊断结论为颈椎髓震荡,颈椎过伸性损...
建立合理有效的()是企业完成计划任务的关键。A.计划体系B.决策体系C.目标体系D.营销体系