首页
登录
职称英语
Mind Your Calories or Your Waistline? Cutting bac
Mind Your Calories or Your Waistline? Cutting bac
游客
2023-11-20
12
管理
问题
Mind Your Calories or Your Waistline?
Cutting back the calories may do more than whittle your waistline; it could protect your brain from the effects of aging. A new study suggests that calorie restriction can help slow the normal process of cell death that happens with age.
Researchers say the body naturally goes through a process known as apoptosis, or cell death, to destroy old cells so new ones can be made, and many factors can alter this process. Age-related diseases, such as Alzheimer’s and Parkinson’s, cause a higher-than-normal loss of cells in the brain, which can lead to loss of function.
Previous studies have suggested that calorie restriction can boost life span and mental capacity. That prompted researchers to look at whether cutting calories might also play a role in protecting aging brain cells. They compared levels of proteins indicating brain cell death in two groups of rats. One group was given unrestricted access to food and water throughout their lives. The other was given 40% fewer calories (but still adequate nourishment) than the unrestricted group.
They found that the levels of these proteins increased with normal aging in the rats fed unrestricted diets. The rats given a restricted diet did not have an increase in the levels of these proteins.
Another protein thought to protect from cell death dropped by 60% in the well-fed rats, but it actually increased over time in the calorie-restricted rats.
Finally, DNA fragmentation, a third indicator of cell death, more than doubled in the unrestricted rats with age, but this increase was 36% less in the calorie-restricted rats.
Although the results are promising, researchers say more study is needed to completely understand the processes that lead to cell death and the role nutrition plays in that process.
Meanwhile, they say, their study provides yet another reason to watch what you eat. "We’re not going to do it right away to improve our memories; we’re going to do it probably in general for the first reasons, which would be to prevent cardiovascular disease and cancer," says Christian Leeuwenburgh at the University of Florida. [br] Which of the following statements is true, according to the passage?
选项
A、Scientists make no progress in the researches.
B、Researchers have made a great breakthrough.
C、More researches are to be made in the field.
D、The more proteins the less calories the better.
答案
C
解析
按照作者的观点,答案应该是C:Although the results are promising,researchers say more study is needed to completely understand the processes that lead to cell death and the role nutrition plays in that process.
转载请注明原文地址:https://tihaiku.com/zcyy/3204385.html
相关试题推荐
It’shightimewe______.cuttingdowntherainforests.A、stoppedB、hadtostopC、
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cutti
MindYourCaloriesorYourWaistline?Cutti
Someoftoday’smostcutting-edgetechnologyisnowbeingusedtohelpstud
Someoftoday’smostcutting-edgetechnologyisnowbeingusedtohelpstud
BurnCaloriesWhileYouDoYourChores!You
SomehowCaliforniaisalwaysatthecuttingedge,beitintheflower-power
SomehowCaliforniaisalwaysatthecuttingedge,beitintheflower-power
SomehowCaliforniaisalwaysatthecuttingedge,beitintheflower-power
随机试题
[originaltext]W:Urn,I’vebeenrackingmybrainsalldaytryingtofigureout
TheTajMahalistoopenonmoonlitevenings20yearsaftersecurityfearse
与丝裂霉素合用或配伍可使丝裂霉素疗效显著下降的是()A:氯丙嗪 B:维生素C
商业银行开展特定目的载体投资业务,应占用( )的授信额度。A.最终债务人 B
患者近期因工作压力大,出现经行乳房胀满疼痛,伴乳头痒痛,甚则痛不可触衣,经行不畅
女性,18岁,因骨肉骨瘤行右大腿截肢术,术后出现患肢痛,护理人员向患者解释中不正
2020年1-12月份,全市固定资产投资3815.36亿元,同比增长6.1%。房
大黄的常用炮制方法有A.酒炙 B.醋炙 C.炒炭 D.姜汁炙 E.酒蒸
轻量化陶瓷产品单件质量(不含配件)正确的是()。A.连体坐便器质量不宜超过
男性,16岁,3天来左膝关节肿胀。自幼于外伤后易出血不止。查体:皮肤黏膜未见
最新回复
(
0
)