主動轉運和被動轉運的區別
而(er)且(qie)還(huan)必(bi)須(xu)消(xiao)耗細(xi)胞代(dai)謝(xie)所產生的能量(liang)來完成(cheng)。被動(dong)運(yun)輸(shu)(passive transport)是(shi)物質順濃(nong)度梯度且(qie)不消(xiao)耗細(xi)胞代(dai)謝(xie)能(ATP)所進行的運(yun)輸(shu)方(fang)式,運(yun)輸(shu)動(dong)力來自質膜內(nei)、外側(ce)物質的濃(nong)度梯度勢能或電位差。被動(dong)運(yun)輸(shu)分(fen)為簡單擴散和易化擴散。
被動轉(zhuan)運是順濃(nong)(nong)度(du)(du)梯度(du)(du)的,從高濃(nong)(nong)度(du)(du)到低(di)濃(nong)(nong)度(du)(du);主動轉(zhuan)運相反,消耗能量,從低(di)濃(nong)(nong)度(du)(du)運到高濃(nong)(nong)度(du)(du)。
被(bei)動(dong)轉(zhuan)(zhuan)運(yun)(yun)是(shi)指物(wu)質(zhi)順電(dian)-化(hua)學(xue)梯(ti)度、不(bu)消耗能(neng)量的跨(kua)膜轉(zhuan)(zhuan)運(yun)(yun)過程(cheng)。而主動(dong)轉(zhuan)(zhuan)運(yun)(yun)則是(shi)指物(wu)質(zhi)逆電(dian)-化(hua)學(xue)梯(ti)度、消耗能(neng)量的跨(kua)膜轉(zhuan)(zhuan)運(yun)(yun)過程(cheng)。
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