首页
登录
职称英语
Running a lever was once thought to be the prerogative of warm-blooded creat
Running a lever was once thought to be the prerogative of warm-blooded creat
游客
2024-06-11
34
管理
问题
Running a lever was once thought to be the prerogative of warm-blooded creatures, whose internal temperatures are independent of the weather. But, as Matthew Kluger reported in "The Importance of Being Feverish" (January 1976), lizards can also develop fevers, even though there is no question that they are cold-blooded. They raise their temperatures by moving into the sun or, in the case of Kluger’s experiments, under a sun lamp. And it seems to do them some good. Sick lizards kept in cages at feverish temperatures fare much better than their counterparts in normal mid cool environments.
Now, fever has spread to invertebrates(无脊椎动物). Recent studies have shown that crayfish and scorpions can develop fevers. Crayfish injected with bacteria and scorpions injected with prostaglandins(前列腺素) swam and scuttled to hot areas. (Prostaglandins are hormones thought to be instrumental in the development of a fever. )
Evidence is also mounting that moderate fevers have their benefits, which might explain why the fever process is so widespread. Leukocytes, white blood cells that are active in fighting bacterial infections, are more mobile at febrile temperatures. And fevers reduce the amount of iron available to bacteria. That reduction, combined with high temperatures, has been shown to inhibit bacterial growth. [br] Which of the following best states the main idea of the passage?
选项
A、Cold-blooded animals can develop fevers.
B、There are benefits to developing fevers.
C、Fevers inhibit bacterial growth.
D、Lizards can develop fevers.
答案
A
解析
这篇文章的主要内容。文章第一段就给予了说明:Running a fever was once thought to be the prerogative of warm-blooded creatures,...(升高体温曾被认为是热血动物的特权)。但是lizards can also develop fevers,even though there is no question that they are cold-blooded.(蜥蜴也能升高体温,尽管他们毫无疑问属于冷血动物。)随后作者进一步说明,
转载请注明原文地址:https://tihaiku.com/zcyy/3629883.html
相关试题推荐
Runningaleverwasoncethoughttobetheprerogativeofwarm-bloodedcreat
Runningaleverwasoncethoughttobetheprerogativeofwarm-bloodedcreat
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
PartyRandomThoughtsLastnight,press
PartyRandomThoughtsLastnight,press
PartyRandomThoughtsLastnight,press
随机试题
Youwillhearanotherfiveshortpieces.Foreachpiecedecidewhatthespeaker
Itisclearthatmanyinstitutionalinvestorsoncevoted______;nowaftersom
[originaltext]Onthe1stofJanuary,newregulationswillcomeintoeffectwhic
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeach
运用回归估计法估计市盈率时,应当注意( ) I重要变量的选择 Ⅱ不同时点指
乌梅丸的组成成分是A:党参,当归B:花椒,肉桂C:黄连,黄芩D:生姜,细辛
下列关于采购与付款循环的职责中,应当分离的有:A.采购中申请的提出与物资使用
2011年上半年,全国电信业务总量累计完成5681.1亿元,比上年同期增长15.
下列描述不符合药物变态反应性口炎的是A.有一定的潜伏期 B.很少伴有皮肤病损
急性心包炎的症状,除了A.眩晕 B.呼吸困难 C.发热 D.心前区痛 E
最新回复
(
0
)