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HOW DO CELLS KNOW When to Divide?

 


Ek en jy het begin as 'n enkele sel, of wat jy 'n eier sou noem. Teen die tyd dat u volwasse is, sal u triljoene selle hê. Die getal hang af van die grootte van die persoon, maar die bioloë het ongeveer 37 triljoen selle. Ja, dit is triljoen met 'n "T" .. IN seldeling word die sel wat deel, die "OUER" -sel genoem. Die moedersel verdeel in twee "dogter" -selle. Die proses word dan herhaal in die sagsiklus. Selle reguleer hul verdeling deur met mekaar te kommunikeer deur middel van chemiese seine van spesiale proteïene wat cyclins genoem word. Hierdie seine dien soos skakelaars om selle aan te dui wanneer hulle moet begin verdeel en later wanneer om te verdeel. Dit is belangrik dat selle verdeel sodat u kan groei en u snye genees. Dit is ook belangrik dat selle op die regte tyd ophou verdeel. As 'n sel nie kan ophou verdeel wanneer dit veronderstel is om te stop nie, kan dit lei tot 'n siekte wat kanker genoem word. Sommige selle, soos velselle, verdeel voortdurend. Ons moet voortdurend nuwe velselle maak om die velselle wat ons verloor, te vervang. Het u geweet dat ons elke minuut 30 000 tot 40 000 dooie vel selle verloor? Dit beteken dat ons elke dag ongeveer 50 miljoen selle verloor. Dit is baie velselle wat vervang moet word, en dit is so belangrik om seldeling in velselle te maak. Ander selle, soos senuwee- en breinselle, verdeel baie minder gereeld.!?

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