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
2024-01-10
8
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/3350594.html
相关试题推荐
Electroniccomputerspeedsarerestrictednotonlybythespeedofel
Despitethefactthatthelifespanofanimalsisconvenientlydividedintosepa
Nolongerconsidered(i)______,thebeliefthatallofPuertoRico’sindigenous
Manyanimalsareableto______theharmfuleffectsofcoldweatherbymeansoffe
Thatbisoncongregateinlargeherdssuggeststhattheyare(i)______animals,ye
Theexistenceofenvironmentalcontaminationisnolongerapointof______;gove
Animalslivelongerwhentheircalorieintakeisrestrictedtotwo-thirdsofwha
Ethnologistsareconvincedthatmanyanimalssurvivethroughlearningbutlearni
Forcenturiesanimalshavebeenusedas____forpeopleinexperimentstoassess
Nolonger(i)____bythebeliefthattheworldarounduswasexpresslydesigned
随机试题
Asabusinesswoman,Icaredeeplyaboutmycustomers.Butlikeanyoneforwh
A
建筑工程施工过程中不安全因素是固定的、可以确定的。
当归补血汤中黄芪与当归的比例是A.6:1B.5:1C.4:1D.3:1E.2:1
“实施污染物排放总量控制,开展流域水质污染防治”这是我国21世纪初可持续发展的(
断腕再植属于()。A.自体移植 B.同种移植 C.异质移植 D.结构移植
共用题干 某大型百货商场因扩大经营规模,需要招聘营业员和选拔值班经理。根据历史
近年来,许多发端于乡间的传统手艺愈发彰显其生命力,这些广泛流传于乡间、以前一直被
商业银行营销的4P是指()。 A.产品B.计划 C.价格D.促销 E
C
最新回复
(
0
)