衛(wèi)生類單選集考試卷模擬考試題_0

1、姓名：_ 班級：_ 學號：_-密-封 -線- 衛(wèi)生類單選集考試卷模擬考試題考試時間：120分鐘 考試總分：100分題號一二三四五總分分數(shù)遵守考場紀律，維護知識尊嚴，杜絕違紀行為，確?？荚嚱Y(jié)果公正。1、human heart can make new cellssolving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell

2、 production slows with age.the finding, published in the april 3 issue of science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say.“we find that the beating cells in the heart, cardiomyocytes, are renewed,” said lead researcher dr. jonas

3、frisen, a professor of stem cell research at the karolinska institute in stockholm, sweden. “it has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed,” he said.the process of renewing these ceils changes over time, frisen added. in a

4、 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percent by age 75.“if we can understand how the generation of new cardiomyocytes is regulated, it may potentially possible to develop pharmaceuticals that promote this proce

5、ss to stimulate regeneration after, for example, a heart attack,” frisen said.that could lead to treatment that helps restore damaged hearts. “a lot of people suffer from chronic heart failure,” noted co-author dr. ratan bhardwaj, also from the karolinska institute. “chronic heart failure arises fro

6、m heart cells dying,” he said.with this finding, scientists are “opening the door to potential therapies to having ourselves heal ourselves,” bhardwaj said. “maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing.”but

7、 barriers remain. according to bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. in addition, the number of new cells the heart produces was estimated using he

8、althy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.the human heart stops producing cardiac cells _. （ ）a.when a person is bornb.when a person becomes oldc.when a person gets sickd.when a person dies2、human heart can make new cellssolving a longstanding myst

9、ery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.the finding, published in the april 3 issue of science, could open a new path for the treatment of heart diseases such as heart fa

10、ilure and heart attack, experts say.“we find that the beating cells in the heart, cardiomyocytes, are renewed,” said lead researcher dr. jonas frisen, a professor of stem cell research at the karolinska institute in stockholm, sweden. “it has previously not been known whether we were limited to the

11、cardiomyocytes we are born with or if they could be renewed,” he said.the process of renewing these ceils changes over time, frisen added. in a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percent by age 75.“if we can u

12、nderstand how the generation of new cardiomyocytes is regulated, it may potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after, for example, a heart attack,” frisen said.that could lead to treatment that helps restore damaged hearts. “a lot of peopl

13、e suffer from chronic heart failure,” noted co-author dr. ratan bhardwaj, also from the karolinska institute. “chronic heart failure arises from heart cells dying,” he said.with this finding, scientists are “opening the door to potential therapies to having ourselves heal ourselves,” bhardwaj said.

14、“maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing.”but barriers remain. according to bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they

15、 are dying off, especially in older patients with heart failure. in addition, the number of new cells the heart produces was estimated using healthy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.the finding could prove to be helpful to _. （ ）a.the study of l

16、ongstanding mysteriesb.the analysis of cardiac cellsc.the prevention of chronic diseasesd.the treatment of heart disease3、human heart can make new cellssolving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, althoug

17、h the rate of new cell production slows with age.the finding, published in the april 3 issue of science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say.“we find that the beating cells in the heart, cardiomyocytes, are renewed,” said lead

18、 researcher dr. jonas frisen, a professor of stem cell research at the karolinska institute in stockholm, sweden. “it has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed,” he said.the process of renewing these ceils changes over ti

19、me, frisen added. in a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percent by age 75.“if we can understand how the generation of new cardiomyocytes is regulated, it may potentially possible to develop pharmaceuticals t

20、hat promote this process to stimulate regeneration after, for example, a heart attack,” frisen said.that could lead to treatment that helps restore damaged hearts. “a lot of people suffer from chronic heart failure,” noted co-author dr. ratan bhardwaj, also from the karolinska institute. “chronic he

21、art failure arises from heart cells dying,” he said.with this finding, scientists are “opening the door to potential therapies to having ourselves heal ourselves,” bhardwaj said. “maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the proble

22、m they are facing.”but barriers remain. according to bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. in addition, the number of new cells the heart produces

23、was estimated using healthy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.the people whore in their mid-70s, only 0.45 percent of cardiomyocytes _. （ ）a.are still functionalb.are replaced each yearc.are lost each yeard.are damaged each year4、human heart can

24、make new cellssolving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.the finding, published in the april 3 issue of science, could open a new path for the tre

25、atment of heart diseases such as heart failure and heart attack, experts say.“we find that the beating cells in the heart, cardiomyocytes, are renewed,” said lead researcher dr. jonas frisen, a professor of stem cell research at the karolinska institute in stockholm, sweden. “it has previously not b

26、een known whether we were limited to the cardiomyocytes we are born with or if they could be renewed,” he said.the process of renewing these ceils changes over time, frisen added. in a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to

27、 only 0.45 percent by age 75.“if we can understand how the generation of new cardiomyocytes is regulated, it may potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after, for example, a heart attack,” frisen said.that could lead to treatment that help

28、s restore damaged hearts. “a lot of people suffer from chronic heart failure,” noted co-author dr. ratan bhardwaj, also from the karolinska institute. “chronic heart failure arises from heart cells dying,” he said.with this finding, scientists are “opening the door to potential therapies to having o

29、urselves heal ourselves,” bhardwaj said. “maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing.”but barriers remain. according to bhardwaj, scientists do not yet know how to increase heart cell production to a rate

30、that would replace cells faster than they are dying off, especially in older patients with heart failure. in addition, the number of new cells the heart produces was estimated using healthy hearts-whether the rate of cell turnover in diseased hearts is the same remains unknown.chronic heart failure

31、is associated with _. （ ）a.the death of heart cellsb.the life span of a personc.the effects of pharmaceuticalsd.the weight of the patient5、human heart can make new cellssolving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the l

32、ife span, although the rate of new cell production slows with age.the finding, published in the april 3 issue of science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say.“we find that the beating cells in the heart, cardiomyocytes, are re

33、newed,” said lead researcher dr. jonas frisen, a professor of stem cell research at the karolinska institute in stockholm, sweden. “it has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed,” he said.the process of renewing these ceil

34、s changes over time, frisen added. in a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0.45 percent by age 75.“if we can understand how the generation of new cardiomyocytes is regulated, it may potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after, for example, a heart attack,” frisen said.