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
财务会计
共用题干 More About Alzheimer \'s DiseaseSci
共用题干 More About Alzheimer \'s DiseaseSci
天天题库
2019-12-17
14
问题
共用题干More About Alzheimer 's Disease
Scientists have developed skin tests that may be used in the future to identify people with Alzheimer's disease and may ultimately allow physicians to predict who is at risk of getting this neurological(神经病学的)disorder.
The only current means of diagnosing the disease in a living patient is a long and expensive series of tests that eliminate every other cause of dementia.
"Since Alois Alzheimer described the disease nearly a century ago,people have been trying to find a way to accurately diagnose it in its early stages,"said Patricia Grady,acting director of the National Institute of Neurological Disorders and Stroke in Bethesda,Maryland."This discovery,if confirmed,could prove a big step forward in our efforts to deal with and understand the disease."
Alzheimer's is the single greatest cause of mental deterioration in older people,affecting between 2.5 million and 4 million people in the United States alone.The devastating disorder gradually destroys memory and the ability to function,and eventually causes death.There is currently no known treatment for the disease.
Researchers discovered that the skin cells of Alzheimer’s patients have defects that interfere with their ability to regulate the flow of potassium in and out of the cells.The fact that the cell defects are present in the skin suggests that Alzheimer's results from physiological changes throughout the body,and that dementia may be the first noticeable effect of these changes as the defects affect the cells in the brain,scientists said.
The flow of potassium is especially critical in cells responsible for memory formation.The scientists also found two other defects that affect the cells'supply of calcium,another critical element.
One test developed by researches calls for growing skin cells in a laboratory culture and then testing them with an electrical detector to determine if the microscopic tunnels that govern the flow of potassium are open.Open potassium channels create a unique electrical signature.
A spokesman for the Alzheimer's Association said that if the validity of the diagnostic test can be proven it would be an important development,but he cautioned that other promising tests for Alzheimer's have been disappointing.
选项
The newly developed skin tests may be used in the future to allow doctors to______.A:cure those with Alzheimer's diseaseB:discover the cause of Alzheimer's diseaseC:predict who might get Alzheimer's diseaseD:find the consequences of Alzheimer's disease
答案
C
解析
由文章第一段的内容可知,皮肤试验的最终目的在于“ultimatelyallowphysicianstopre-dictwhoisatriskofgettingthisneurologicaldisorder",所以只有C项符合题意。 根据文章第二段的内容可知,老年痴呆症很难确诊,它的诊断是一个漫长且代价昂贵的过程。故D项正确。 由文章第四段最后一句“Thereiscurrentlynoknowntreatmentforthedisease.”可知,目前还没有针对该病的确切疗法。D项的内容与此不符,故选D。 第五段中谈到了两者的关系:"Alzheimer'sresultsfromphysiologicalchanges…andthatdementiamaybethefirstnoticeableeffectofthesechanges…",也就是说痴呆病是老年痴呆症的表现之一。 最后一段发言人谈到这一试验的前途时较为含蓄,只说试验如能证明有效自然是一大发展,但他同时提醒人们以前的试验看上去也很有前途,结果却令人失望。因此,只有C项符题意。
转载请注明原文地址:https://ti.zuoweng.com/ti/bPOfKKKQ
相关试题推荐
B题干图形依次含有1,2,3,4,5个三角形,只有B项含6个三角形。
C题干图形均只有一个部分,A,B,D各由3,2,3部分构成,选C。
B题干图形均有四个封闭区域。
C题干前两位相同,排除A;后五位为希腊字母+数字+三个不同的大写字母,只有C项符合。故答案选C。
A题干由三种字母组成,其组合形式是AABBACCA,只有A项符合。
B题干图形包含的交点数依次为5、4、3、2、1、(0),只有B符合。
A.4 B.8 C.3√2 D.4√2A题干数列是公比为√2的等比数列。
D根据题干第二个图形的结构,可排除A、B、C,如图所示:
A题干图形中都含有4个封闭区域,选项中只有A项符合。
B题干符号规律为ABCDEAB,只有B项符合此规律。故答案选B。
随机试题
A保险公司正在与两家新客户就其团体保险计划进行谈判,这两家新客户的相关信息如下:
刘先生失业后,一家人依靠低保金生活,为帮助刘先生一家,社会工作者小侯做了下列工作
在管道正常顶进时,管道下部()范围内不得超挖。 A.135°B.
X线胸片诊断慢性肺源性心脏病的主要依据,下列哪项不符合 A.可有明显肺
背景 某建设单位的二级干线硅芯管管道建设工程由一甲级通信信息网络系统集成企业资
女性,24岁,间断腹痛、腹泻2年半,发作期与缓解期交替出现,大便为黏液、脓血便,一日2~3次,重时达数十次,便后腹痛可缓解,查血白蛋白29g/L,消瘦,贫...
女性,35岁。步行中后仰滑倒,右手掌撑地。现右肩痛,不敢活动。检查见右肩方肩畸形,Dugas征(+)。 为诊断首先采用的辅助检査是A.B超B.X线片C.C
根据《建设工程安全生产管理条例》,施工单位应当设立安全生产管理机构,配备专职安全生产管理人员,其中负责对安全生产进行现场监督检查的是()。A、施工单位主要负责
共用题干 第一篇Whataretheadvantagesanddisadvantagesofgreenhousetechnology?T...
共用题干某品牌汽车销售商为了对该品牌汽车的销售情况做出准确判断,需要对汽车市场的汽车总体销售量、不同类别的汽车销售量以及一些具体规格型号汽车的销售情况进...