Video: Lub luag haujlwm ntawm macula densa cells yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nws nyob ze ntawm lub vascular ncej ntawm lub glomerulus thiab nws lub ntsiab muaj nuj nqi yog tswj cov ntshav siab thiab pom tus nqi ntawm glomerulus. Cov macula densa yog ib phau ntawm tshwj xeeb epithelial hlwb nyob rau hauv lub distal convoluted tubule uas ntes sodium concentration ntawm cov kua nyob rau hauv lub tubule.
Hais txog qhov no, ua haujlwm ntawm Juxtaglomerular cells yog dab tsi?
Cov hlwb juxtaglomerular (JG hlwb, lossis cov hlwb granular) yog cov hlwb hauv raum uas tsim tawm, khaws cia, thiab zais cov enzyme renin. Lawv tshwj xeeb tshaj yog cov leeg nqaij cov leeg feem ntau nyob hauv cov phab ntsa ntawm cov hlab ntsha sib xyaw, thiab qee qhov hauv cov hlab ntshav, uas xa cov ntshav mus rau glomerulus.
Ib yam li ntawd, cov hlwb dab tsi ua rau Juxtaglomerular apparatus? Cov khoom siv sib xyaw ua ke muaj peb hom cell: the macula densa cell, cov menyuam yaus sib txuas thiab cov extraglomerular mesangial cells.
Qhov thib ob, macula densa cells zais dab tsi?
Macula densa hlwb nyob rau hauv qhov deb nephron, raws li cov qauv qub, yog cov ntsev ntsev uas tsim cov tshuaj paracrine hauv lub cev juxtaglomerular los tswj cov kev ua haujlwm tseem ceeb ntawm lub raum, suav nrog lub raum ntshav ntws, pom lub plab, thiab tso zis tawm.
Yuav ua li cas cov macula densa hlwb tswj lawv lub luag hauj lwm raws li ib feem ntawm Tubuloglomerular tawm tswv yim voj?
Tubuloglomerular Feedback Regulates Ib leeg Nephron GFR 3). Nce distal tubular Na+ concentration ua rau cov macula densa hlwb ua o. Kev o ntawm macula densa hlwb teeb tsa kev sib tw ntawm cov hlab ntshav ze ze kom lub glomerular pom ntawm tib lub nephron tau qis dua.
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