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1、智課網(wǎng)TOEFL備考資料托福閱讀材料:肺部味覺摘要:托福閱讀考試題目中經(jīng)常出現(xiàn)關(guān)于人體器官的介紹,像這樣專業(yè)性比較強的文章考生們?nèi)绻麤]有讀過是很難理解的,所以考生在備考時要多了解一些這方面的知識,比如小編為大家整理的托福閱讀材料之肺部有味覺。在以往的研究中,人們認為人體的味覺器官并不包括肺部,但是最新一項研究卻發(fā)現(xiàn)肺部肌肉有“品嘗”苦味的功能。Takeadeepbreath.Tasteanything?Actually,yourlungsmay.Becausescientistshavediscoveredthatthesamereceptorsthatexistontheto
2、nguetotastebittersubstancesarealsofoundonthesmoothmuscleofthelungs.Researcherswerestudyingthereceptorsonsmoothlungmusclesthatregulatecontractionandrelaxationoftheairways.That’swhentheymadethediscovery—whichwassounexpectedthattheresearchersthemselveswereskeptical.Finally,theybecameconvincedth
3、atthereceptorswerereallythere,thoughnotclusteredintastebudsastheyareonthetongue.Thescientiststhenexposedhumanandmouseairwaystovariousbittercompoundstogaugetheeffects.Manytoxiccompoundsarebitter,sotheresearchersexpectedthelungmuscletotenseupandcontract—tocompelthebreathertomoveawayfromwhateve
4、rwasbitterandperhapstoxic.But,inasecondsurprise,bittercompoundsrelaxedandopenedairwaysbetterthananyexistingasthmadrug.ThestudyisinthejournalNatureMedicine.Researcherswillcontinuetosearchfortheroleofthereceptors.Meanwhile,theworkrepresentsasurprisingnewleadinthesearchfordrugstotreatasthma,emp
5、hysemaorchronicbronchitis.—CynthiaGraber這就是今天為大家準備的托福閱讀備考資料的簡單介紹,同學如果需要完整版的托福閱讀材料之肺部有味覺可以點擊下面的立即下載按鈕獲取,另外我們還為大家準備了更多的托福備考資料,歡迎大家下載。相關(guān)推薦:托福閱讀材料:天琴座流星雨P(guān)BT托福閱讀真題全套打印版新老托福閱讀對比相關(guān)字搜索:托福閱讀材料