I-feedback loop engalungile uhlobo lohlelo lokuzilawula. Kulolu hlobo lwama-loop we-feedback, ukukhuphuka okuvela ohlelweni kuvimbela ukukhiqizwa esizayo ngesistimu. Ngamanye amazwi, uhlelo lulawula ukuthi umkhiqizo wenza kangakanani ngokuvala ukukhiqizwa lapho amazinga okukhishwa noma inani lomkhiqizo oqoqiwe liphakama kakhulu. Izinhlelo zokungalungi zempendulo zinomthwalo wemithi eminingi ye-hormone regulation emzimbeni womuntu. Zikulungele ukugcina amazinga amaningi okukhiqizwa.
Futhi eyaziwa ngokuthi: i-loop engavinjelwe
Umzimba njenge-Factory - Feedback Loops Ukuphatha Ukukhiqizwa
Cabanga ukuthi umzimba ungumkhiqizi weMkhiqizo X. Ngaphezu kwalokho, cabanga ukuthi ukwenza umkhiqizo omkhulu kakhulu kubiza futhi kuyingozi. Ngakho-ke, umzimba udinga indlela yokuvala ifoni lapho kwenziwa uMkhiqizo X okwanele. Yenza lokhu ngokusebenzisa i-feedback loop negative. Lokho kusho ukuthi ijubane lokukhiqiza lizwela kakhulu kuMkhiqizo X. Uma liqala ukwakha, ukukhiqiza kuphuza bese kuyeka. Okuphambene nalokhu kungaba yinto enhle yokuphendula. Uma kunjalo, uMkhiqizo X ngaphezulu wawukhona, isitshalo esisheshayo singenza ngaphezulu. Lolu hlobo lwenqubo luphuma kalula ekulawuleni. Ngokuphambene, i-loop negative feedback is self-regulating.
Izibonelo ze-Feedback Negative Loops ohlelweni lokuzala
Omunye umqondo ophikisayo we- feedback loop ungumjikelezo wesifazane wesifazane . I-hypothalamus ikhiqiza i-gonadotropin ekhulula i-hormone (GnRH).
I-GnRH ibonisa ukuthi i-pituitary ikhiqiza i-follicle evuselela i-hormone (FSH). I-FSH itjela ama-ovari ukukhiqiza i-estrogen. Amazinga aphezulu e-estrogen (kanye ne-progesterone ne-testosterone, elawulwa ngamalokhi afanayo), akwenqabela ukukhiqizwa kwe-GnRH. Lokhu kubangela ukuthi i-pituitary yenza i-FSH engaphansi, okubangela ukuba ama-ovari enze i-estrogen encane.
Enye i-loop yokuphendula iqondisa i-acidity yangasese. I-pH yangasese yesidoda isilinganiso esingaba ngu-4 - ngomusa acidic. Lokhu kusiza ukuvimbela ukukhula kwama- bacterium nezinkinga ze- STD ezinenkinga. Eqinisweni, enye yezimpawu ze- bacterial vaginosis yi-pH engenhla 5. I-lactic acid egcina lokhu i-pH yenziwa i-lactobacilli - ingxenye yezinto ezijwayelekile zasemanzini . Lawa ma-bacteria akhula ngokushesha futhi akhiqize ama-acid amaningi ngaphezulu kwe-pH. Khona-ke, lapho i-pH isondela ku-4, ihamba kancane iphinde imise. Yile ndlela i-pH elawulwa ngayo ngaphakathi kwesiswini. Ibuye ichaze umehluko phakathi kwamaphini ahlukene abesifazane besifazane. I-pH ihlukahluka kuye ngokuthi amabhaktheriya athile akhona.
Imithombo:
I-Boskey ER, i-Cone RA, i-Whaley KJ, i-Moench TR. Imvelaphi yobuhle besisu: ubukhulu obuphezulu be-D / L lactate buhambisana namabhaktheriya engumthombo oyinhloko. Uhlehlisiwe. 2001 Sep; 16 (9): 1809-13.
I-Boskey ER, iTelsch KM, iWhaley KJ, i-Moench TR, i-Cone RA. Ukukhiqizwa kwama-acid nge-vagin flora e-vitro kuhambisana nesilinganiso nobukhulu be-acidification yesisindo. I-immun engaphelele. 1999 Oct; 67 (10): 5170-5.