托福阅读材料之肺部有味觉

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1、智课网TOEFL备考资料托福阅读材料之肺部有味觉摘要：很多考生在备考托福阅读时候都会以来或者看些托福阅读材料，这些材料会帮助考生更加了解托福阅读，所以今天小编就推荐这篇托福阅读材料之肺部有味觉，我们一起来看一下。托福阅读背景材料是考生在备考时一定要看的内容，而且是看的越多越好，今天就为大家分享一篇关于肺部有味觉的托福阅读背景知识。在以往的研究中，人们认为人体的味觉器官并不包括肺部，但是最新一项研究却发现肺部肌肉有“品尝”苦味的功能。Takeadeepbreath.Tasteanything?Actually,yourlungsmay.Becausescientistsh

2、avediscoveredthatthesamereceptorsthatexistonthetonguetotastebittersubstancesarealsofoundonthesmoothmuscleofthelungs.Researcherswerestudyingthereceptorsonsmoothlungmusclesthatregulatecontractionandrelaxationoftheairways.That’swhentheymadethediscovery—whichwassounexpectedthattheresearchers

3、themselveswereskeptical.Finally,theybecameconvincedthatthereceptorswerereallythere,thoughnotclusteredintastebudsastheyareonthetongue.Thescientiststhenexposedhumanandmouseairwaystovariousbittercompoundstogaugetheeffects.Manytoxiccompoundsarebitter,sotheresearchersexpectedthelungmuscletote

4、nseupandcontract—tocompelthebreathertomoveawayfromwhateverwasbitterandperhapstoxic.But,inasecondsurprise,bittercompoundsrelaxedandopenedairwaysbetterthananyexistingasthmadrug.ThestudyisinthejournalNatureMedicine.Researcherswillcontinuetosearchfortheroleofthereceptors.Meanwhile,theworkrep

5、resentsasurprisingnewleadinthesearchfordrugstotreatasthma,emphysemaorchronicbronchitis.—CynthiaGraber以上就是关于肺部有味觉的托福阅读材料，大家可以从中积累高分词汇及句型，并且练习提升阅读速度，迅速找到托福阅读的主题句和出题点。相关推荐:托福阅读十周快速提分计划托福阅读高分利器：词汇扎实归纳能力强托福词汇知识延伸【微生物】文本+MP3相关字搜索：托福阅读资料