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class="user_id noshow">913</em>由 <em class="nickname"></em> 分享</span> <span id="tmyyfroktkho" class="fl arc_btn"></span> </div> </div> </div> <div id="tmyyfroktkho" class="y_ju"><script type="text/javascript">a("title");</script></div> <div id="tmyyfroktkho" class="con_article con_main" id="contentText"> <p>什么螞蟻?zhàn)畲?/p><p> 　　螞蟻為常見(jiàn)的昆蟲(chóng)之一，分布于全世界，幾乎無(wú)處不有，為昆蟲(chóng)中占優(yōu)勢(shì)的種類(lèi)，其個(gè)體數(shù)超過(guò)所有陸地上生物。螞蟻的種類(lèi)很多，最大的螞蟻在澳洲昆士蘭和新南威爾士北部，成為公牛蟻。雖然看著不起眼的小動(dòng)物。但是，你知道嗎，螞蟻可是當(dāng)之無(wú)愧的大力士!</p><p> 　　據(jù)力學(xué)家測(cè)定，一只螞蟻能夠舉起超過(guò)自身體重400倍的東西，還能夠拖運(yùn)超過(guò)自身體重1700倍的物體。美國(guó)哈佛大學(xué)的昆蟲(chóng)學(xué)家馬克莫費(fèi)特，是一位對(duì)亞洲蟻頗有研究的學(xué)者。根據(jù)他的觀察，10多只團(tuán)結(jié)一致的螞蟻，能夠搬走超過(guò)它們自身體重5000倍的蛆或者別的食物，這相當(dāng)于10個(gè)平均體重70公斤的彪形大漢搬運(yùn)3500噸的重物，即平均每人搬運(yùn)350噸，從相對(duì)力氣這個(gè)角度來(lái)看，螞蟻是當(dāng)之無(wú)愧的大力士。小小的螞蟻為什么能有如此神力?科學(xué)家們作了大量的研究、分析，證明螞蟻體內(nèi)是一座微型動(dòng)物營(yíng)養(yǎng)寶庫(kù)，每100克螞蟻能產(chǎn)生2929千焦(700千卡)的熱量?？茖W(xué)工作者發(fā)現(xiàn)，螞蟻腿部肌肉是一部高效率的“發(fā)動(dòng)機(jī)”，這個(gè)“肌肉發(fā)動(dòng)機(jī)”又由幾十億臺(tái)微妙的“小發(fā)動(dòng)機(jī)”組成。所以，螞蟻能產(chǎn)生如此非凡超常的力量。螞蟻的“肌肉發(fā)動(dòng)機(jī)”使用的是一種特殊的“燃料”，是一種結(jié)構(gòu)非常復(fù)雜的含磷化合物，稱(chēng)為三磷酸腺苷，即ATP。在許多場(chǎng)合下，只要肌肉在活動(dòng)時(shí)產(chǎn)生一點(diǎn)兒酸性物質(zhì)(這種感覺(jué)就是我們平常說(shuō)的“胳膊酸了”)就能引起這種“燃料”的劇烈變化，這種變化能使肌肉蛋白的長(zhǎng)形分子在霎那間收縮起來(lái)，產(chǎn)生巨大的力量。這種特殊的“燃料”不經(jīng)過(guò)燃燒就能把潛藏的能量直接釋放出來(lái)，轉(zhuǎn)變?yōu)闄C(jī)械能，加之不存在機(jī)械摩擦，所以幾乎沒(méi)有能量的損失。正因?yàn)槿绱?，螞蟻?ldquo;肌肉發(fā)動(dòng)機(jī)”的效率非常高，可高達(dá)80%以上，這就是“螞蟻大力士”的奧秘。</p><p> 　　如果仔細(xì)看看螞蟻搬東西的樣子，便可以發(fā)現(xiàn)：它們搬運(yùn)的物品往往都會(huì)超過(guò)自己身體重量的幾十倍呢!書(shū)上看見(jiàn)到科學(xué)家做過(guò)試驗(yàn)：將一塊小石子，然后，將這只螞蟻與它搬運(yùn)的石子，分別稱(chēng)一下，想不到，這塊小石子的重量，競(jìng)?cè)怀^(guò)螞蟻體重50多倍。</p><p> 　　螞蟻從這一點(diǎn)上來(lái)說(shuō)可為是動(dòng)物世界上的“大力士”呀!</p><p> 　　你以為螞蟻的腿是“皮”包了“水”，不是的。它腿部的肌肉，是一臺(tái)有效的肌肉發(fā)動(dòng)機(jī)組;而使用的“燃料”，是一種結(jié)構(gòu)復(fù)雜的化學(xué)物質(zhì)。當(dāng)螞蟻?zhàn)邉?dòng)的時(shí)候，它腿部的肌肉產(chǎn)生一種酸性物質(zhì)，引起這種“燃料”的急劇變化，這時(shí)肌肉收縮起來(lái)，一臺(tái)臺(tái)“肌肉動(dòng)機(jī)”就會(huì)產(chǎn)生巨大的動(dòng)力，螞蟻便將比它身體重幾十倍的東西舉超來(lái)。</p> </div> <div id="tmyyfroktkho" class="y_ju"><script type="text/javascript">a("conten");</script></div> <div id="tmyyfroktkho" class="pnum"> <ul id="page_slice"> <div id="tmyyfroktkho" class="clear"></div> </ul> </div> </article> <div id="tmyyfroktkho" class="list_hot ar_related bj_mt20 louti"> <h4 class="title2 title2_te">相關(guān)文章</h4> <ul class="bj_mt20"> <li id="tmyyfroktkho" class="lb_3 chao"> <time>04-13</time> <a 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