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Scientists say they have found a way to turn body fat into a better type of fat that burns off calories and weight The US Johns
Scientists say they have found a way to turn body fat into a better type of fat that burns off calories and weight The US Johns
admin
2022-01-04
76
问题
Scientists say they have found a way to turn body fat into a better type of fat that burns off calories and weight The US Johns Hopkins team made the【C1】________in rats but believe the same could be done in humans, offering the hope of a new way to treat obesity.
【C2】________the expression of a protein linked to【C3】________not only reduced the animals’ calorie intake and weight but also【C4】________their fat composition.
Brown fat is【C5】________in babies, which they use as a【C6】________source to generate body heat,【C7】________calories at the same time. But as we age our brown fat largely【C8】________and gets replaced by "bad" white fat, which【C9】________sits as a spare tyre around the waist.
"We will need a lot more work to tease this out, but it could offer a(n)【C10】________way to develop new treatments for obesity", an expert said.
Experts have【C11】________that stimulating the body to make more brown fat【C12】________white fat could be a helpful way to control weight and【C13】________obesity and its related health problems. Various teams have been searching for a way to do this, and Dr Sheng Bi and colleagues at the Johns Hopkins University School of Medicine believe they may have cracked it. They designed an experiment to see【C14】________suppressing an appetite-stimulating protein called NPY would decrease body weight in rats. When they silenced NPY in the brains of the rats they found their appetite and food【C15】________decreased. Even when the rats were fed a very【C16】________, high-fat diet they still managed to keep more weight【C17】________than rats who had fully functioning NPY. The scientists then checked the fat【C18】________of the rats and found an interesting change had occurred. In the rats with silenced NPY expression, some of the bad white fat had been replaced with good brown fat.
The researchers are【C19】________that it may be possible to achieve the same effect in people by injecting brown fat stem cells【C20】________the skin to burn white fat and stimulate weight loss.
【C14】
选项
A、if
B、where
C、that
D、how
答案
A
解析
空格前的to see表明本句说的是实验的目的。下文描述实验,通过抑制叫作NPY的蛋白质。使得老鼠的体重减轻了,故这个实验的目的就是看抑制这种蛋白质会不会令老鼠体重减轻,故选A项if“是否”。B项where“哪里”,本句没有问地点。C项that可引导宾语从句,代入句中意思是专家设计这样一个实验来看这个结果(to see that…),而根据下文的描述,在做实验之前,专家并不确定结果是怎样的,故不能选that。D项how“如何”,下文主要是探讨抑制NPY对减轻体重有没有效果,而不是讲如何减轻体重的。
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0
考研英语二
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