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
53
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
假定2016年12月12日,某企业股票开盘价为10元,收盘价为12元,最高价为1
中医学整体观念指的是 A.人自身结构的完整性,脏腑功能的整体性 B.人体生理
6岁小儿,正常饮食,活动如常,其每天需要需要的能量是 A、150kal/kg
心理咨询主要技术有()
教育法规的适用是指国家专门机关依照法定的职权和程序将教育法规具体运用于某一事项或
下列选项中,不属于灵芝(赤芝)药材特征的是
肺硅沉着症早期病变表现在 A支气管腺体肥大增生,杯状细胞增多 B肺门淋巴结
外阴纤维瘤的临床表现是A.多个肿块,多发生于阴唇B.生长缓慢、质软,位于皮下组织内,呈圆形分叶状C.多见于大阴唇,肿瘤表面可有溃疡和坏死D.生长迅速,肿瘤包膜完
改性沥青混合料面层适用于城镇()。A.快速路B.主干路C.次干路D.辅路E.人行道
已知某普通股的p值为1.2,无风险利率为6%,市场组合的风险收益率为10%,该普通股的市价为21元/股,筹资费用为1元/股,股利年增长率长期固定不变,预计...