I-loop engalunganga yindlela yolawulo oluzilawulayo. Kulo hlobo loop loop, ukunyuka okuphuma kwinkqubo kukuthintela ukuveliswa kwenkqubo ngelixa elizayo. Ngamanye amazwi, inkqubo ilawula indlela umkhiqizo owenza ngayo ngokuvala ukuveliswa kwemveliso xa amazinga omveliso okanye isixa semveliso eqokelelweyo iphakamileyo kakhulu. Iinkqubo zengxelo ezingalunganga zinoxanduva lweentlobo ezininzi zomthetho we-hormone kumzimba womntu. Zikulungele ukugcina amazinga amaninzi aveliswayo.
Kwaziwa nangokuthi: i- loop inhibitory
IQumrhu njengeQinisekiso-I-Feedback Loops iLawula ukuveliswa
Khawucinge ukuba umzimba ungumveliso we-Factory X. Ngaphezu koko, cinga ukuba ukwenza umkhiqizo omkhulu kakhulu X kuyabiza kwaye kuyonakalisa. Ngako oko, umzimba ufuna indlela yokuvala umbane xa uMveliso we-X okwenziwe. Yenza oku nge-loop negative feedback. Kuthetha ukuthini ukuba ijubane lemveliso lijongene nexabiso leMveliso X. Xa liqala ukwakhiwa, ukuveliswa kwemveliso kuyancipha kwaye kume. Okuchasene nalokhu kuya kuba yinto evuyayo yokuphendula. Kwimeko apho, ukukhutshwa kweMveliso X kwakukho, isityalo eso siza kwenza ngaphezulu. Olu hlobo lwenkqubo luphuma lula ekulawuleni. Ngokwahlukileyo, i-loop ye-feedback engalunganga yilawulayo.
Imizekelo yeMpendulo Engalunganga Imiphumo kwiNkqubo yokuBala
Omnye oqondwa kakuhle ngongoma wokungena kwimizuzu engumnqweno wesini . I-hypothalamus ivelisa i-gonadotropin ekhulula i-hormone (GnRH).
I-GnRH ibonisa ukuba i-pituitary ivelise i-hormone evuselela i-hormone (FSH). I-FSH ixelela ii-ovari ukuvelisa i-estrogen. Amanqanaba aphezulu e-estrogen (kunye neprogesterone kunye ne testosterone, ezilawulwa ngolu hlobo olufanayo) kunjalo, zivimbela ukuveliswa kweGnRH. Oku kubangela ukuba i-pituitary yenza i-FSH engaphantsi, nto leyo eyenza ama-ovari enze i-estrogen encinane.
Enye i-loop feedback ilawula ubukhulu besisu. I-pH yesiganeko esisisigxina sinamalunga nama-4 - i-acidic acly. Oku kunceda ukukhusela ukukhula kweebhaktheriya ezinengxaki kunye nee- STD . Enyanisweni, enye yeembonakaliso ze- bacterial vaginosis yi-pH engentla 5. I-acid ye lactic egcina le pH yenziwa yi-lactobacilli - inxalenye yeziqhelo eziqhelekileyo zamanzi . Ezi bhaktheriya zikhula ngokukhawuleza kwaye zivelise ama-asidi ngaphezulu kwi-pH ephezulu. Emva koko, xa i-pH isondela kwi-4, iyancipha kwaye imise. Yile ndlela i-pH ilawulwa ngayo kwisini. Kwakhona kuchaza enye imohluko kumabhinqa ahlukeneyo asemzimbeni we-pH. I-pH ihluka ngoxhomekeke kwiibhaktheriya ezithile ezikhoyo.
Imithombo:
I-Boskey ER, iCone RA, iWhaley KJ, i-Moench TR. Imvelaphi ye-acidity yangasini: ukuphakama kwe-D / L ye-lactate ephezulu kuhambelana neebhaktheriya kuba ngumthombo oyintloko. Hlondi. 2001 Sep; 16 (9): 1809-13.
I-Boskey ER, iTelsch KM, iWhaley KJ, i-Moench TR, iCone RA. Ukuveliswa kwe-acid nge-vaginal flora in vitro kuyahambelana nesantya kunye nobukhulu be-acid acidification. Immun Immun. 1999 Oct; 67 (10): 5170-5.