Te Tukanga o te Hanga Mimi i roto i ngā Whatukuhu
He whekau nui ngā whatukuhu i roto i te pūnaha whakaputa uri o te tangata, he mahi nui tā rātou ki te pupuri i te taurite o te wai me te electrolyte. Ko tētahi o ngā mahi matua a ngā whatukuhu ko te whakaputa mimi, koinei te huarahi a te tinana ki te whakakore i ngā para me te pupuri i te homeostasis. Ko te tukanga hanga mimi i roto i ngā whatukuhu he maha ngā wāhanga uaua e mahi tahi ana me te ngākau mārie.
1. Te Hanganga me te Mahi o ngā Whatukuhu
I mua i te kōrero mō te tukanga hanga mimi, he mea nui kia mārama ki te hanganga me te mahi a ngā whatukuhu. Ko te tikanga he takirua ngā whatukuhu o te tangata kei ia taha o te tuaiwi, i raro noa i ngā rara. Kei roto i ia whatukuhu tata ki te kotahi miriona ngā waeine iti e kiia nei ko ngā nephron, arā, ngā waeine mahi e uru ana ki te hanga mimi.
Kei roto i ia nephron he glomerulus me he ngongo. Ko te glomerulus he kohinga o ngā uaua toto e mahi ana hei tātari tuatahi, ko te ngongo ia he ngongo e tukatuka ana i te tātari hei hanga mimi.
2. Te Tātaritanga o te Pūkahukahu
Ko te taahiraa tuatahi o te hanganga mimi ko te tātari glomerular. Ka puta tēnei tukanga i roto i te glomerulus, te wāhi e rere ai te toto i roto i ngā capillaries, ā, ka tātarihia. Ka panaia e te pēhanga toto te wai me ngā ngota iti (pērā i te wai, te hukahuka, ngā katote, me ngā para hauota) i waho o te toto ka tomo ki roto i te kāpū Bowman e karapoti ana i te glomerulus. Ko te hua o tēnei tukanga he wai e kiia nei ko te tātari glomerular.
He mea whiriwhiri tēnei tukanga tātari i runga i te rahi o te ngota ngota. Ko ngā pūtau toto me ngā pūmua nui kāore e taea te haere mā te tātari glomerular, ā, ka noho tonu ki roto i te toto. Ko te tere tātari glomerular (GFR) he tawhā nui e tohu ana i te pai o te tātari a ngā whatukuhu. Ko te GFR noa kei waenganui i te 90-120 ml/meneti, ā, ko te hekenga o te GFR ka tohu pea i te ngoikore o te mahi a te whatukuhu.
3. Te mimiti anō i roto i te ngongo tata
I muri i te tātari, ka neke te tātari glomerular ki te ngongo proximal. I konei, ka puta te mimiti anō, te wāhi ka mimiti anō te nuinga o te wai, ngā electrolytes, me ngā matūkai nui ki roto i te toto. Tata ki te 65% o te mimiti anō o te konutai me te wai, tae atu ki te nuinga o te huka me ngā waikawa amino, ka puta i roto i te ngongo proximal.
He microvilli kei roto i ngā pūtau i roto i ngā pakitara o ngā ngongo proximal e whakanui ana i te horahanga o te mata mō te mimiti anō. He tino whai hua tēnei tukanga, ā, he aro ki ngā hiahia o te tinana, kia kore ai e ngaro ngā wāhanga nui i roto i te mimi.
4. Te Porowhita o Henle me te Ngongo Anō
Kātahi ka uru te tātari ki te koropiko o Henle, ka wehea kia rua ngā wāhanga: te peka e heke ana me te peka e piki ana. He tino uru te peka e heke ana o te koropiko o Henle ki te wai engari he iti ake te uru ki ngā katote me te urea. I konei, ka tangohia te wai mai i te tātari mā te osmosis, ka whakanui ake i te kukū o te matū wairewa.
He rerekē, kāore te peka e piki ake ana o te koropiko a Henle e uru ki te wai engari e kawe kaha ana i ngā katote, inā koa te konutai, te pāhare pāporo, me te pūhaumāota, ki roto i te wai interstitial o te medulla whatukuhu.
Mā te huinga o te mimiti anō o te wai i te peka e heke ana me te nekehanga katote i te peka e piki ana ka hanga he pikinga osmotic he mea nui mō te kukū o te mimi.
5. Ngā Ngongo Distal me te Whakahaere Hormonal
I muri i te whitinga i te koropiko o Henle, ka neke te tātari ki te ngongo distal. I konei, ka puta te mimiti anō me te huna, e pāngia ana e te maha o ngā homoni.
Aldosterone: Ka whakaohohia e tēnei homoni te mimiti anō o te konutai me te whakaputanga pāhare pāporo i roto i te ngongo distal, e āwhina ana ki te whakahaere i te toto toto me te taurite electrolyte.
Homoni Ārai-Diuretic (ADH): Ka whakanuia e tēnei homoni te urunga o ngā pakitara o ngā ngongo ki te wai, ka nui ake te mimiti o te wai ki roto i te toto, ā, ka whakaitihia te nui o te mimi.
He mahi tā te ngongo distal ki te whakarerekē i te hanganga whakamutunga o te mimi, ā, he wāhi nui hoki ia mō te whakahaere i te homeostasis o te tinana.
6. Te Kohikohi i roto i te Ara o te Takirere
Ko te toenga o te wai i konatunatua, e kiia nei ko te mimi, ka tukuna ki ngā awa kohi. Ka haria e ēnei awa te mimi ki te pelvis whatukuhu, mai i reira ka rere ki roto i ngā ureter, kātahi ka rongoatia mō tētahi wā poto ki roto i te pūkahukahu i mua i te whakaputanga mā te urethra.
Ka whai wāhi atu hoki ngā awa kohi ki te mimiti anō o te wai e whakahaeretia ana e te ADH, me te mimiti anō o te urea, e whai wāhi ana ki te whakahaere i te osmolarity o te medullary whatukuhu.
7. Te Whakahaere me te Whakarerekētanga Hihiri
He tino hihiri te tukanga hanga mimi, ā, ka urutau tonu ki ngā hiahia ā-tinana o te tinana. Ka pāngia te whakaputanga me te hanganga o te mimi e ngā āhuatanga pēnei i te inu wai, te kai, te taumata hauora, me te hauora whānui.
He tikanga whakahaere-ā-ringa anō hoki ā ngā whatukuhu hei pupuri i te GFR pumau ahakoa ngā rerekētanga o te toto toto. He mahi nui tā te pūnaha renin-angiotensin-aldosterone (RAAS) i roto i tēnei, inā koa hei whakautu ki ngā huringa o te nui o te toto, ki te hekenga rānei o te toto toto.
8. Whakamutunga
He raupapa uaua engari he whai hua te tukanga hanga mimi i roto i ngā whatukuhu, e whakarite ana kia tangohia pai ngā para i te tinana, me te pupuri tonu i te taurite o roto. He mahi nui tā ia wāhanga o te whatukuhu, mai i te glomerulus ki te awa kohikohi, hei whakarite kia mau tonu ngā matū nui i te tinana, kia whakakorea hoki ngā mea kāore e tika ana.
Mā te mārama ake ki tēnei tukanga, ka taea e tātou te mārama ki te hiranga o te pupuri i te hauora o ngā whatukuhu mā te noho hauora, te inu wai nui, me te kai taurite. Ko tēnei māramatanga anō hoki te pūtake o ngā wawaotanga hauora maha hei whakahaere i ngā mate whatukuhu me te whakarite i te oranga mō te wā roa.
