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
Dangers Await Babies with Altitude Women who live in the world’s highest communities tend to give birth to underweight babie
Dangers Await Babies with Altitude Women who live in the world’s highest communities tend to give birth to underweight babie
admin
2015-07-08
89
问题
Dangers Await Babies with Altitude
Women who live in the world’s highest communities tend to give birth to underweight babies, a new study suggests. These babies may grow into adults with a high risk of heart disease and strokes.
Research has hinted that newborns in mountain communities are lighter than average. But it wasn’t clear whether this is due to reduced oxygen levels at high altitude or because their mothers are under-nourished—many people who live at high altitudes are relatively poor compared with those living lower down.
To find out more,Dino Giussani and his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998. The babies were born in both rich and poor areas of two cities:La Paz and Santa Cruz. La Paz is the highest city in the world, at 3. 65 kilometers above sea level, while Santa Cruz is much lower, at 0.44 kilometers.
Sure enough, Giussani found that the average birthweight of babies in La Paz was significantly lower than in Santa Cruz. This was true in both high and low-income families. Even babies born to poor families in Santa Cruz were heavier on average than babies born to wealthy families in lofty La Paz. "We were very surprised by this result,"says Giussani.
The results suggest that babies born at high altitude are deprived of oxygen before birth. " This may trigger the release or suppression of hormones that regulate growth of the unborn child," says Giussani.
His team also found that high-altitude babies tended to have relatively larger heads compared with their bodies. This is probably because a fetus starved of oxygen will send oxygenated blood to the brain in preference to the rest of the body.
Giussani wants to find out if such babies have a higher risk of disease in later life. People born in La Paz might be prone to heart trouble in adulthood, for example. Low birthweight is a risk factor for coronary heart disease. And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life.
The results of the study indicate the reason for the birth of underweight babies is______.
选项
A、lack of certain nutrition
B、poverty of their mothers
C、different family backgrounds
D、reduction of oxygen levels
答案
D
解析
由第五段“The results suggest that babies born at high altitude are deprived of oxygenbefore birth.”可知,研究结果表明,在高海拔地带出生的婴儿出生前就缺氧,这也是造成其出生体重低的原因,故选D。
转载请注明原文地址:https://kaotiyun.com/show/aDmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Youwillhearonepassageaboutscienceanddailylife.Beforeyoulisten,readthelistofstatements,fiveofwhicharesummar
Youwillhearfiveconversationstakingplaceinrestaurantsandthecustomersarecomplainingaboutsomething.Beforeyoul
Youwillhearfivepeoplegivingtheiropinionsonspankingchildren.Forquestions9-13,choosefromthelistA-Fwhateac
Nina’sparentssaidshewasn’ttousetheirnewcamera.letNina’sparents____________________usetheirnewcamera.
AJOBWITHRISKSHaveyoueverbeentothecinemaandwonderedinamazement.how AMAZEfilmstarsmanaget
ANEWCRUISESHIPOneofthebiggestpassengershipsinhistory,theIslandPrincess,carriespeopleoncruisesaroundtheCa
Johnhasmadeuphismindnottogotothemeeting.
ExerciseCutsCancerDeathsinMenMenwhoexerciseoftenarelesslikelytodiefromcancerthanthosewho(51)newresearchpubl
Anythingtodowithaeroplanesandflyingfascinateshim.
Thepolicemanwrotedownalltheparticularsoftheaccident.
随机试题
不是大便秘结原因的一项是
复发性口腔溃疡很少见于
断面具有红棕色与白色相间的大理石样花纹的药材是()。
A.鼻流清涕B.鼻溃烂塌陷C.久流浊涕而有腥臭D.鼻翼煽动E.酒糟鼻
子宫内膜异位导致不孕病人选用以下哪种治疗方案
与一般焊后热处理相比,球罐整体热处理独具特点的目的是( )
某基础公司总承包、某建设分承包公司分包的轨道交通某车站工程工地上,分承包单位进行桩基础旋喷加固施工。上午5时30分左右,1号桩机(井架式旋喷桩机)机操工王某,辅助工冯某、孙某3人在C8号旋喷桩桩基施工时,辅助工孙某发现桩机框架上部6m处油管接头漏油,在未停
目前应用较为广泛的无损检验方法中,能发现焊缝内部气孔、夹渣、裂纹及未焊透等缺陷的是()。
1918年后,西方各国对苏联采取了敌视和封锁政策。但1931年,美国出口的机器设备中,有50%卖给苏联。1929—1930年,英国机器出口总量的70%销往苏联,而1932年竟高达90%。这种变化是因为()。
在结构化分析方法中,用于描述系统中所用到的全部数据和文件的文档称为【】。
最新回复
(
0
)