Imibuzo Eyisibonelo kanye Nengxoxo Ngenqubo Yokwakheka Komchamo Ezinso
Ukuqonda inqubo yokwakheka komchamo kubalulekile ekuqondeni uhlelo lokukhipha umchamo lomuntu. Izinso, njengezitho eziyinhloko kulesi simiso, zihlunga igazi, zisuse imfucuza, zigcine ibhalansi yoketshezi kanye ne-electrolyte, futhi zikhiqize ama-hormone abalulekile. Lesi sihloko sizoxoxa ngokuningiliziwe ngenqubo yokwakheka komchamo, kanye nezinkinga zesampula ukukusiza uqonde lokhu.
Inqubo Yokwakheka Komchamo Ezinso
Ukwakheka komchamo ezinso kuqukethe izigaba ezintathu eziyinhloko: ukuhlunga kwe-glomerular, ukumuncwa kabusha, kanye nokukhiqizwa kweshubhu.
1. Ukuhlunga kwe-Glomerular
Ukuhlunga kwenzeka ku-glomerulus, iqoqo lama-capillary egazi atholakala ku-nephron. Le nqubo yenzeka lapho umfutho wegazi uphoqa amanzi kanye nezinhlayiya ezincane ezivela egazini ngezindonga zama-capillary ziye ku-capsule kaBowman, kwakha i-glomerular filtrate. Izinhlayiya ezihlungwayo zifaka phakathi ama-ion, ama-amino acid, i-glucose, kanye ne-urea, kuyilapho amaseli egazi namaprotheni amakhulu ehlala egazini.
2. Ukumuncwa kabusha kwe-Tubular
Uma sekwakhiwe, i-glomerular filtrate ingena ku-proximal tubule. Lapha, kuphinde kufakwe amanzi amaningi kanye nezinto ezibalulekile egazini. Izinto ezifana ne-glucose, i-sodium, i-potassium, kanye nama-ion e-bicarbonate zifakwa ngokukhetha ngokusebenzisa izindlela zokuthutha ezisebenzayo nezingasebenzi.
3. Ukukhiqizwa Kwe-Tubular
Inqubo yokugcina iwukukhipha, lapho izinto ezithile ezifana nama-ion e-hydrogen, i-potassium, ne-ammonia, kanye nemithi okumele ikhishwe emzimbeni, zithuthwa zisuka egazini ziye oketshezini oluyishubhu. Lokhu kusiza ukugcina ibhalansi ye-acid-base yomzimba futhi kususwe ubuthi egazini.
Imibuzo Yengxoxo Eyisibonelo
Ukuze ujulise ukuqonda kwakho, nansi eminye imibuzo eyisibonelo kanye nezingxoxo zayo mayelana nenqubo yokwakheka komchamo.
Umbuzo 1:
Chaza ukuthi umfutho wegazi ophakeme ungathinta kanjani inqubo yokuhlunga i-glomerular?
Ingxoxo:
Umfutho wegazi ophezulu ungakhuphula umfutho we-hydrostatic ku-glomerulus. Ngenxa yalokho, uketshezi oluningi kanye nezincibilikisi kungafakwa ku-capsule kaBowman, kwandise umthamo we-glomerular filtrate. Kodwa-ke, uma umfutho uphakeme kakhulu, ungalimaza izindonga ze-capillary, uphazamise ukusebenza kwezinso isikhathi eside futhi uvumele izinto okungafanele zihlungwe, njengeprotheni, ukuthi zingene emchameni—isimo esaziwa ngokuthi i-proteinuria.
Umbuzo 2:
Kungani i-glucose ikhona emchameni wabantu abanesifo sikashukela, yize ivame ukumuncwa ngokuphelele?
Ingxoxo:
Kubantu abanesifo sikashukela, amazinga kashukela egazini aphezulu kakhulu kangangokuthi adlula amandla aphezulu okuphinda amuncwe (umkhawulo wezinso) wama-renal tubules. Lapho ukugcwala kweglucose ku-filtrate kudlula lo mkhawulo, izinso azikwazi ukumunca yonke i-glucose, ngakho-ke i-glucose eyengeziwe ikhishwa emchameni.
Umbuzo 3:
Umzimba ulawula kanjani ibhalansi yama-ion e-potassium egazini ngenqubo esezinso?
Ingxoxo:
Izinso zigcina ibhalansi ye-potassium ion ngokukhishwa kwe-tubule ku-distal tubule kanye nomsele wokuqoqa. Uma amazinga e-potassium egazini ephezulu, i-aldosterone iyavuselelwa, okwandisa ukukhishwa kwe-potassium emchameni. I-Aldosterone ivuselela iphampu ye-sodium-potassium ATPase ukuze kwandiswe ukukhishwa kwe-potassium kanye nokumuncwa kabusha kwe-sodium, okusiza ukunciphisa amazinga e-potassium egazini.
Umbuzo 4:
Yiziphi izici ezingathonya inqubo yokumuncwa kabusha kwamanzi ezinso?
Ingxoxo:
Inqubo yokumuncwa kabusha kwamanzi ezinso ithonywa kakhulu yi-antidiuretic hormone (ADH). I-ADH yenza izindonga ze-tubule zingene kalula emanzini, okwandisa ukumuncwa kwamanzi emuva egazini. Ezinye izinto ezithonyayo zifaka phakathi i-osmolality yegazi, umthamo wegazi, kanye nomfutho we-osmotic. Ukulahlekelwa igazi okukhulu noma ukuphelelwa amanzi emzimbeni kungandisa ukumuncwa kwe-ADH, kuyilapho ukugcwala koketshezi kunganciphisa ukumuncwa kwe-ADH.
Isiphetho
Inqubo yokwakheka komchamo iyisibonelo esiphelele sendlela umzimba wethu olawula ngayo imvelo yawo yangaphakathi ngendlela eyinkimbinkimbi. Ukuqonda isigaba ngasinye sale nqubo kusenza sikwazi ukwazisa indima ebalulekile yezinso empilweni nasezifweni. Ngokusebenzisa izinkinga eziyisibonelo kanye nezingxoxo, sithemba ukuqinisa ukuqonda kwethu kanye nekhono lokubhekana nezinselele zokufunda ngohlelo lokukhipha umchamo.
Ngemibuzo efanele yokuzijwayeza kanye nokuqonda okujulile kwemiqondo, singalusebenzisa kalula lolu lwazi ezimweni zezokwelapha kanye nokuphila kwansuku zonke. Ukufunda ngemizimba yethu kuyisinyathelo esibalulekile ekuthuthukiseni ikhwalithi yethu yokuphila nokuqinisekisa ukusebenza kahle komzimba.
