Nangona oku kunokubonakala ngathi kusengqiqweni, ndiyathandabuza ukuba abantu abaninzi bayasazi esona sizathu sokuba kutheni kuyimfuneko ukugxila ekucuthekeni okucothayo kwemisipha xa usenza iiseti zokuphindaphinda. Okanye mhlawumbi ubusoloko uzibuza ukuba kutheni kwaye namhlanje siza kukubonisa impendulo.
Izihlunu zethu zikhonkotha ngenxa yeendlela ezininzi ezahlukeneyo zebhayoloji kunye neekhemikhali, zonke ezenzeka phakathi kweemillisecond ezimbalwa. Oku kuvumela iibhulorho ezinqamlezayo ukuba zenzekile actin kunye ne-myosin (iintlobo ezimbini zeprotheyini) ezinyukayo xa izihlunu zifinyela. Umncinci ubungakanani bobunzima esihambayo kuqeqesho (ngaphandle kokufikelela kwi ukusilela), ngokukhawuleza izinga lokunciphisa, livumela ukuba inani elincinci le-actin-myosin-cross-bridges lenze. .
Kuba ukubonakaliswa kwethu kwamandla kuhambelana ngokuthe ngqo nenani leebhulorho ezinqamlezileyo ezenziweyo, ukuba neebhulorho ezinqamlezileyo ze-actin-myosin ezimbalwa ezenziweyo kuthetha ukuba kuveliswa amandla amancinci.
Ngakolunye uhlangothi, umthwalo onzima, ucotha umlinganiselo wokunqanda, ukuvumela ukuba iibhulorho ezininzi ze-actin-myosin zenze. Kwakhona, amandla aphumayo alingana ngokuthe ngqo nenani leebhulorho ezinqamlezayo ezenziweyo, oku kuthetha ukuba imveliso yamandla nayo iya kuba nkulu. .
Masigxininise kumgaqo wokunyanzeliswa kwesantya
Njengoko isantya sokunciphisa imicu ye-muscle (i-twitch ekhawulezayo) inyuka, amandla avelisiweyo ayancipha (kunye nelinye icala). Iintsinga zemisipha zisebenzisa amandla aphezulu xa zifinyezwa kancinane, kodwa amandla aphantsi xa afinyezwa ngokukhawuleza. Oku kungenxa izinga elicothayo lokunciphisa livumela ukuba iibhulorho ezininzi ze-actin-myosin zenze ngexesha elinye, kunye ne-actin-myosin-cross-bridges yintoni evumela i-fiber ye-muscle nganye ukuba ivelise amandla.
Ngokwahlukileyo, amazinga okunciphisa ngokukhawuleza abangela ukuba i-actin-myosin-cross-bridges ngaphakathi kwe-muscle fibers iphuke ngesantya esikhawulezayo, ekhokelela ekunciphiseni iibhulorho ezinqamlezayo ngaxeshanye nangaliphi na ixesha. Ke ukuba ufuna ukonyusa amandla akho, kubalulekile ukuba ugxile ekwenzeni ukucutha komsipha ocothayo.