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Iata ce spun oamenii de stiinta.
Telomerii si imbatranirea
Telomerii sunt segmente de ADN de la terminatiile cromozomilor care ii impiedica pe acestia sa se distruga reciproc (ceea ce ar conduce la nefunctionarea corespunzatoare a celulelor). Telomerii sunt parte integrala din procesul de imbatranire.
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De fiecare data cand o celula se divide, telomerul se scurteaza, iar atunci cand acesta devine atat de mic incat nu se mai poate divide, celula devine inactiva sau moare. Astfel, lungimea telomerului determina viata unei celule. Cu fiecare telomer cu care se scurteaza si cu fiecare celula care moare, imbatranim. Iar cand toti telomerii se scurteaza, toate celulele mor, iar noi odata cu ele.
Citeste continuarea pe SFATULPARINTILOR.RO.
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