首页
登录
职称英语
Animals live longer when their calorie intake is restricted to two-thirds of wha
Animals live longer when their calorie intake is restricted to two-thirds of wha
游客
2025-02-20
19
管理
问题
Animals live longer when their calorie intake is restricted to two-thirds of what is considered normal for their species. Animals so restricted are also generally healthier: most disease, including cancer, diabetes, and neurodegenerative illness, are forestalled. Q2This phenomenon was long attributed to a simple slowing of metabolism (cells’ production of energy from fuel molecules) and consequent reproduction of its toxic by-products in response to less food. In fact, however, calorie restriction does not slow mammalian metabolism, and Q1in yeast and worms, metabolism is both sped up and altered. Some scientists now theorize that calorie restriction is a biological stressor that, like natural food scarcity, induces a more complex defensive response, which in mammals includes changes in cellular defenses and repair. [br] In the passage, the function of the highlighted portion is to
选项
A、Provide specific examples of organisms whose longevity does not increase in response to calorie restriction.
B、Illustrate the probable means by which organisms placed on a calorie-restriction diet compensate for the reduction in available food-based level.
C、Suggest the mechanism that is responsible for prolonging the life of organism whose calorie intake is significantly reduced.
D、Give an example that explain why scientists’ thinking about the physiological effects of calorie restriction changed.
E、Distinguish the different ways that mammalian and non-mammalian metabolisms respond to significant reductions in calorie intake
答案
D
解析
本题定位在第四句。本句话的功能是用来反驳之前的老观点,而高亮部分的酵母菌和蠕虫相当于起到反驳作用的例子。因此D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3965156.html
相关试题推荐
FAUNA:ANIMALS::A、flora:plantsB、vegetation:aboriginalsC、fowl:amphibians
PANDEMIC:A、obliviousB、criticalC、restrictedD、relaxingE、immaculateC
Electroniccomputerspeedsarerestrictednotonlybythespeedofel
Electroniccomputerspeedsarerestrictednotonlybythespeedofel
Electroniccomputerspeedsarerestrictednotonlybythespeedofel
Electroniccomputerspeedsarerestrictednotonlybythespeedofel
Despitethefactthatthelifespanofanimalsisconvenientlydividedintosepa
Thatbisoncongregateinlargeherdssuggeststhattheyare(i)______animals,ye
Becausethephotographerbelievedthatwildanimalsshouldbe(i)______onlyint
Forcenturiesanimalshavebeenusedas____forpeopleinexperimentstoassess
随机试题
LaborDayisanationalholidayintheUnitedStates.Ithasbeencelebrated
Don'tforgetto_______yourschoolbagw
为防止电气线路因绝缘损坏引起火灾,宜设置哪一种保护?()A.短路保护 B.
工地安全日记应由项目部专职资料员逐日填写。()
人工降温期间发生御寒反应,出现体表和中心体温的温差,须密切监测体温,不能反应全身
隧道通风方式,选择时考虑的因素有( )。A.政治经济文化 B.隧道长度 C
某高校组织学生参加社会实践,每年年初会集中评审立项,一经立项即划拨社会实践经费1
下列负债中,属于企业非流动债务的有()。A.长期借款 B.应付股利 C.预
(2018年真题)下列属于专项安全检查内容的是( )。A.临时用电检查 B.
施工职业健康安全管理体系文件包括管理手册、程序文件、作业文件三个层次,关于其编写
最新回复
(
0
)