kawg ntawm ib txoj hlua ntev ntev uas khaws cov zis los ntawm cov nephrons (cov qauv ntawm tes hauv lub raum uas lim ntshav thiab tsim cov zis) thiab txav mus rau hauv lub raum pelvis thiab ureters. Kuj hu ua lub raum sau tubule.
Cov ducts nyob rau hauv lub raum nyob qhov twg?
Ntau ntu ntawm nephrons nyob rau hauv ntau qhov chaw ntawm lub raum: Lub cortex muaj lub raum corpuscle, proximal, thiab distal convoluted tubules. Cov medulla thiab medullary rays muaj cov voj voog ntawm Henle thiab khaws cov ducts.
Yuav zais dab tsi los ntawm kev khaws cov kav dej?
Lub alpha-intercalated cell ntawm kev sib sau duct yog lub luag haujlwm tseem ceeb rau hydrogen secretion rau hauv cov zis. Cov pa roj carbon dioxide, uas yog tsim los ntawm cov hlwb thiab nkag los ntawm cov ntshav, hloov mus rau carbonic acid. … Lub hydrogen ion yog secreted rau hauv lub lumen los ntawm lub luminal H(+)-ATPase.
Lub luag haujlwm tseem ceeb ntawm kev sau tubule yog dab tsi?
Lub luag haujlwm tseem ceeb ntawm cortical collecting tubule yog txhawm rau nce cov fractional solute contribution thiab meej concentration ntawm urea hauv cov kua uas nws xa mus rau sab nraud medullary sau duct. Kev ua haujlwm ntawm cov medullary sab nraud khaws cov duct yog txhawm rau nce ntxiv qhov tseeb intraluminal urea concentration.
Cov ducts ntawm cov zis tsim nyob rau hauv lub raum yog dab tsi?
Thaum cov lim tawm ntawm lub glomerulus, nws ntws mus rau hauv ib qhoduct nyob rau hauv lub nephron hu ua lub raum tubule. Thaum nws txav mus, cov khoom xav tau thiab qee cov dej tau rov qab los ntawm lub raj phab ntsa rau hauv cov hlab ntsha uas nyob ib sab. Qhov no reabsorption ntawm cov as-ham tseem ceeb los ntawm cov filtrate yog kauj ruam thib ob hauv cov zis tsim.
