首页
登录
职称英语
Reducing calories by 30 percent appears to slow the rate of aging in monkeys
Reducing calories by 30 percent appears to slow the rate of aging in monkeys
游客
2023-08-29
26
管理
问题
Reducing calories by 30 percent appears to slow the rate of aging in monkeys, providing new evidence that humans might live longer by eating less. A study by the National Institutes of Health using about 200 monkeys has shown that a well-balanced diet that includes a sharp reduction in calories caused the animals to have a lower body temperature, a slower metabolism(新陈代谢)and fewer changes in the biochemical markers for aging.
"This shows that what has been demonstrated in mice also can apply in primates(灵长类动物)," said Dr. George Roth, a scientist at the gerontology research center of the National Institute on Aging. "We have known for 70 years that if you feed laboratory mice less food, they age slower, they live longer and they get diseases less frequently, " he said. "We find that monkey respond in the same way as rodents and that the same biological changes may be in play here. "
Joseph Kemnitz, a researcher at the primate center at the University of Wisconsin in Madison, said that changing the diets of monkeys in his laboratory had had similar effects but that the study was not finished. "The findings to date from several labs do suggest that the intervention has beneficial effects on health and on reducing age-related diseases and may ultimately extend the life span for primates, " he said.
Dr. Barbara Hansen of the obesity and diabetes research center at the University of Maryland in Baltimore said that her laboratory had been studying the effects of dietary restriction on the life span of rhesus monkeys(猕猴)for almost 15 years and that the results to date had shown that the monkeys have less illness and obesity. She said it would take at least 10 years to prove that reducing calories extends life. Dr. Hansen said that half of the monkeys on unrestricted diets died prematurely, while only 12.5 percent of those on calorie-restricted died at an early age. Restricting calories, she said, reduced the rates of cancer, heart disease and diabetes in the test animals. Monkeys in the study may live three decades or longer, and a complete test of the hypothesis would require a full monkey lifetime, Dr. Hansen said.
In the N. I. H. study, Dr. Roth said, monkeys adapted to restricted calories by dropping their temperature by about one degree and slowing the metabolic demands of the body. Dr. Roth said other biochemical measurements also showed that eating less was healthy for the monkeys. "We have monkeys of all different ages, and those on caloric restrict all showed the same drop in temperature along with the other beneficial effects," he said.
The study is continuing and involves 200 monkeys. Dr. Roth said that the diets of the monkeys included all of the required vitamins and other nutrients but that half of the monkeys received about 30 percent fewer calories than a control group. [br] From the passage, we can learn that______.
选项
A、the effect calorie reduction has on monkeys is still not obvious at all
B、the monkey is a new experiment subject for animal scientists
C、calorie is a harmful substance as far as health is concerned
D、the consensus of the opinion on calorie reduction good to health has been almost reached
答案
D
解析
推理判断题。选项涉及的信息比较散,采取排除和肯定的解题技巧。用猴子来进行研究并发现减少卡路里对健康和寿命能产生积极影响,这个结论已由一些科学家得出,从文章中看没有相反的观点,所以选项[D]正确。[A]、[B]与事实不符;[C]过于绝对,而且文中没有涉及。
转载请注明原文地址:https://tihaiku.com/zcyy/2967048.html
相关试题推荐
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
Inthetwodecadesbetween1910and1930,overtenpercentoftheBlackpopu
Inthetwodecadesbetween1910and1930,overtenpercentoftheBlackpopu
Inthetwodecadesbetween1910and1930,overtenpercentoftheBlackpopu
Reducingcaloriesby30percentappearstoslowtherateofaginginmonkeys
Reducingcaloriesby30percentappearstoslowtherateofaginginmonkeys
Reducingcaloriesby30percentappearstoslowtherateofaginginmonkeys
Formostpeople,fatisaburden.Itdoesn’treallymatterwhereitappears,
Formostpeople,fatisaburden.Itdoesn’treallymatterwhereitappears,
随机试题
Changesinthewaypeoplelivebringaboutchangesinthejobsthattheydo.Mor
著名的唯美主义杰作《珐琅和雕玉》的作者是()A.波德莱尔 B.戈蒂耶 C.王
2000年2月11日15时40分左右,某市一个体加油站发生火灾,死亡2人,炸塌小
选用流动式起重机时,主要是根据()。A.起重机的吊装特性曲线图表 B.起重
患者,女性,64岁。独居,刚搬进一新居所,因急性哮喘发作入院治疗,护士协助患者采
患儿,4岁。气喘,喉间哮鸣,咳嗽,痰稀色白有泡沫,形寒肢凉,无汗,口不渴,小便清
不依赖维生素K的凝血因子是()。A.Ⅱ B.Ⅶ C.Ⅷ D.Ⅸ E.Ⅹ
下列各项属于扩张型战略的是()。A:一体化战略 B:抽资转向战略 C:调整战
如图所示两跨等截面梁,受移动荷载P作用,截面相同,为使梁充分发挥强度,尺寸a应为
(2017年真题)我国期货合约涨跌停板的计算以该合约上一交易日的()为依据
最新回复
(
0
)