Inqubo Yokwakheka Komchamo Ezinso
Izinso ziyizitho ezibalulekile ohlelweni lokukhipha uketshezi lomuntu, zidlala indima ebalulekile ekugcineni ibhalansi yoketshezi kanye ne-electrolyte. Omunye wemisebenzi eyinhloko yezinso ukukhiqiza umchamo, okuyindlela yomzimba yokususa ukungcola nokugcina i-homeostasis. Inqubo yokwakheka komchamo ezinso ihilela izigaba eziningana eziyinkimbinkimbi ezisebenza ndawonye ngokuvumelanayo.
1. Ukwakheka Nokusebenza Kwezinso
Ngaphambi kokuxoxa ngenqubo yokwakheka komchamo, kubalulekile ukuqonda isakhiwo kanye nomsebenzi wezinso. Abantu ngokuvamile banezinso ezimbili ezitholakala kuzo zombili izinhlangothi zomgogodla, ngaphansi nje kwezimbambo. Inso ngayinye iqukethe cishe amayunithi amancane ayisigidi abizwa ngokuthi ama-nephron, okuyizinto ezisebenzayo ezihilelekile ekwakhekeni komchamo.
I-nephron ngayinye iqukethe i-glomerulus kanye ne-tubule. I-glomerulus iqoqo lama-capillary asebenza njengesihlungi sokuqala, kanti i-tubule iyipayipi elicubungula i-filtrate ukuze lakhe umchamo.
2. Ukuhlunga kwe-Glomerular
Isinyathelo sokuqala ekwakhekeni komchamo ukuhlunga kwe-glomerular. Le nqubo yenzeka ku-glomerulus, lapho igazi ligeleza khona ngemithambo yegazi bese lihlungwa. Umfutho wegazi uphusha uketshezi nama-molecule amancane (njengamanzi, i-glucose, ama-ion, kanye nokungcola kwe-nitrogen) egazini bese ungena ku-capsule kaBowman ezungeze i-glomerulus. Umphumela wale nqubo uketshezi olubizwa ngokuthi i-glomerular filtrate.
Le nqubo yokuhlunga ikhetha ngokusekelwe kubukhulu bama-molecule. Amaseli egazi namaprotheni amakhulu ngokuvamile awakwazi ukudlula esihlungini se-glomerular futhi ahlale egazini. Izinga lokuhlunga le-glomerular (GFR) liyipharamitha ebalulekile ekhombisa ukuthi izinso zihlunga kahle kangakanani. I-GFR evamile isukela ku-90-120 ml/ngomzuzu, kanti ukwehla kwe-GFR kungabonisa ukusebenza kwezinso okungasebenzi kahle.
3. Ukumuncwa kabusha ku-Proximal Tubule
Ngemva kokuhlunga, i-glomerular filtrate iya ku-proximal tubule. Lapha, kuphinde kufakwe amanzi, lapho iningi lamanzi, ama-electrolyte, nezakhamzimba ezibalulekile ziphinde zifakwe egazini. Cishe u-65% wokufakwa kabusha kwe-sodium namanzi, kanye cishe nawo wonke ama-glucose nama-amino acid, kwenzeka ku-proximal tubule.
Amaseli asezindongeni zama-proximal tubules ane-microvilli ekhulisa indawo engaphezulu ukuze imuncwe kabusha. Le nqubo isebenza kahle kakhulu futhi iyazwela izidingo zomzimba, iqinisekisa ukuthi izingxenye ezibalulekile azilahleki emchameni.
4. I-Henle's Loop kanye Nokumuncwa Okuqhubekayo
I-filtrate ibe isingena ku-loop ye-Henle, ehlukana kabili: umlenze owehlayo nowenyukayo. Umlenze owehlayo we-loop ye-Henle ungena kakhulu emanzini kodwa ungangeni kakhulu kuma-ion kanye ne-urea. Lapha, amanzi akhishwa ku-filtrate yi-osmosis, okwandisa ukuhlushwa kwe-solute.
Ngokuphambene nalokho, ingxenye ekhuphukayo ye-Henle's loop ayingeni emanzini kodwa ithutha ngenkuthalo ama-ion, ikakhulukazi i-sodium, i-potassium, ne-chloride, iye oketshezini lwe-renal medulla.
Ukuhlanganiswa kokumuncwa kwamanzi kabusha esithweni esehlayo kanye nokunyakaza kwama-ion esithweni esenyukayo kudala i-osmotic gradient ebalulekile ekugxilweni komchamo.
5. Ukulawulwa Kwe-Distal Tubule kanye ne-Hormonal
Ngemva kokudlula ku-loop ye-Henle, i-filtrate iya ku-distal tubule. Lapha, kuphinde kufakwe futhi kukhishwe, kuthonywe ama-hormone amaningana.
I-Aldosterone: Le hormone ivuselela ukumuncwa kabusha kwe-sodium kanye nokukhishwa kwe-potassium ku-distal tubule, okusiza ukulawula umfutho wegazi kanye nebhalansi ye-electrolyte.
I-Antidiuretic Hormone (ADH): Le hormone ikhulisa ukungena kwamanzi ezindongeni ze-tubule, okuvumela ukumuncwa kwamanzi amaningi egazini futhi kunciphisa umthamo womchamo.
I-distal tubule idlala indima ekulungiseni ukwakheka kokugcina komchamo, okwenza kube yindawo ebalulekile yokulawula i-homeostasis yomzimba.
6. Ukuqoqwa ku-Valve Ductus
I-filtrate esele, manje ebizwa ngokuthi umchamo, ithunyelwa emigudwini yokuqoqa. Le migudwini ithutha umchamo iye e-pelvis yezinso, lapho ugeleza khona ungene kuma-ureter bese ugcinwa okwesikhashana esinyini ngaphambi kokuba ukhishwe nge-urethra.
Amapayipi okuqoqa ahilelekile ekumuncweni kwamanzi okwengeziwe okulawulwa yi-ADH, kanye nokumuncwa kabusha kwe-urea, okusiza ekulawulweni kwe-osmolarity ye-renal medullary.
7. Ukulawulwa Okuguquguqukayo Nokulungiswa
Inqubo yokwakheka komchamo inamandla kakhulu futhi ivumelana njalo nezidingo zomzimba. Izici ezifana nokudla okumanzi, ukudla, izinga lokufaneleka komzimba, kanye nempilo ejwayelekile zingathinta ukukhiqizwa komchamo kanye nokwakheka kwawo.
Izinso nazo zinezindlela zokulawula i-GFR ezizinzile naphezu kokushintshashintsha komfutho wegazi. Uhlelo lwe-renin-angiotensin-aldosterone (RAAS) ludlala indima ebalulekile kulokhu, ikakhulukazi ekuphenduleni izinguquko kumthamo wegazi noma ukwehla komfutho wegazi.
8. Isiphetho
Inqubo yokwakheka komchamo ezinso iwuchungechunge lwezinyathelo eziyinkimbinkimbi kodwa ezisebenzayo eziqinisekisa ukuthi imfucuza ikhishwa kahle emzimbeni ngenkathi kugcinwa ibhalansi yangaphakathi efanele. Yonke ingxenye yezinso, kusukela ku-glomerulus kuya emgudwini wokuqoqa, idlala indima ebalulekile ekuqinisekiseni ukuthi umzimba ugcina izinto ezibalulekile futhi ususa ezingadingekile.
Ngokuqonda kangcono le nqubo, singabona ukubaluleka kokulondoloza impilo yezinso ngendlela yokuphila enempilo, ukudla uketshezi okwanele, kanye nokudla okulinganiselayo. Lokhu kuqonda kuphinde kusekele izindlela eziningi zokwelapha zokuphatha izinkinga zezinso nokuqinisekisa inhlalakahle yesikhathi eside.
