首页
登录
职称英语
Mind Your Calories or Your Waistline? Cutti
Mind Your Calories or Your Waistline? Cutti
游客
2023-11-20
21
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] The main purpose of these researchers is
选项
A、to help to destroy old cells and boost new ones.
B、to alter the natural process known as apoptosis.
C、to compare different levels of proteins.
D、to find out ways to protect aging brain cells.
答案
D
解析
根据提问,先找到关于研究目的的段落:That prompted researchers to look at whether cutting calories might also play a role in protecting aging brain ceils.
转载请注明原文地址:https://tihaiku.com/zcyy/3203344.html
相关试题推荐
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cuttingbac
MindYourCaloriesorYourWaistline?Cutti
MindYourCaloriesorYourWaistline?Cutti
MindYourCaloriesorYourWaistline?Cutti
BurnCaloriesWhileYouDoYourChores!You
BurnCaloriesWhileYouDoYourChores!You
随机试题
Intheearly1950stheresearcherswhoproducedthefirstcladglassoptical
Henevertriedtohidehis______forthosewhowerenotasintelligentashim.A
[originaltext]M:WouldyoulikeacopyofprofessorHenry’sarticle?W:Thanks,
PremierePro中,实时调节音频(音量调节)的数据会以下列()方式记录关
咽结合膜热的病原是A.腺病毒 B.合胞病毒 C.轮状病毒 D.单纯疱疹病毒
(2019年真题)关于定量研究和定性研究的说法,正确的是()。A.定量研究重在
世界各国都将公共秩序保留作为捍卫本国根本利益的一项重要法律制度。关于这一制度,下
需要保护和控制雷电电磁脉冲环境的建筑物应划分为不同的雷电防护区,关于雷电防护区的
桥梁防水系统施工时,防水层检测的主控项目是( )。A.含水率 B.粗糙度
最新回复
(
0
)