PCT yoog raws li kev rov nqus tau li cas?

2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44

Cov proximal convoluted tubule yog siv rau kev xaiv rov qab nqus cov piam thaj, dej, peptides thiab lwm yam khoom noj los ntawm cov kua tubule rov qab rau hauv cov ntshav. Cov kab mob hauv lub cev no tau muab tso ua ke, kom ntseeg tau tias thaj chaw zoo tshaj plaws rau reabsorption . Cov molecules no coj mus rau hauv lub cell nrog rau sodium.

Tsis tas li ntawd, PCT reabsorb dab tsi?

Muaj ntau qhov reabsorption tshwm sim hauv PCT . Reabsorption yog thaum dej thiab solutes hauv PCT raug tshem tawm thiab rov qab mus rau hauv cov ntshav. Reabsorption nyob rau hauv lub tubules ze yog isosmotic. Hauv PCT 65% dej, 100% qabzib, 100% amino acids, 65% potassium, 65% chloride thiab 67% sodium yog reabsorbed.

Ib yam li ntawd, xaiv reabsorption tshwm sim li cas? Xaiv reabsorption tshwm sim vim tias thaum lub sijhawm ultrafiltration, cov khoom tseem ceeb ntawm cov ntshav raug lim tawm thiab lawv yuav tsum tau ua reabsorbed rau hauv lub cev. Qhov no tshwm sim los ntawm lawv diffusing los ntawm cov lim mus rau hauv cov cell hauv ob sab sib luag convoluted tubule.

Yooj yim li ntawd, cov piam thaj rov qab nqus tau hauv PCT li cas?

Ua ntej, lub qabzib Nyob rau hauv lub proximal tubule yog co-transported nrog sodium ions mus rau hauv lub proximal convoluted tubule phab ntsa hla SGLT2 tus neeg thauj khoom. Ib zaug hauv phab ntsa tubule, tus qabzib thiab amino acids diffuse ncaj qha mus rau hauv cov ntshav capillaries nrog ib tug concentration gradient.

Puas yog cov piam thaj rov qab nqus hauv cov tubules sib thooj sib sib zog nqus?

Glucose reabsorption yuav siv qhov chaw hauv cev proximal ntawm lub nephron, ib lub raj coj tawm ntawm Bowman's capsule. Cov cell uas kab cev proximal recapture muaj nuj nqis molecules, suav nrog qabzib . Lub mechanism ntawm reabsorption yog qhov sib txawv rau cov molecules sib txawv thiab cov kuab tshuaj.