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Filtrado glomerular
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Se describen algunas características del filtrado glomerular
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Test Banks For Guyton and Hall Textbook of Medical Physiology 14th Edition by John E. Hall; Michael E. Hall,
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TEST BANK For Guyton and Hall Textbook of Medical Physiology 14th Edition by John E. Hall; All Chapters 1 - 86, Verified Newest Version
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TEST BANK FOR GUYTON AND HALL TEXTBOOK OF MEDICAL PHYSIOLOGY 14TH EDITION BY JOHN E. HALL Guyton And Hall Textbook Of Medical Physiology 14th Edition Test Bank (Complete Chapters 1-85) Updated Version...
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genLa cantidad de orina filtrada es de 1801 al dia. Parte de este filtrado se reabsorve, lo que dela unicamente 12 para su
excreción diaria. La alta tasa de filtración depende de la alta tasa de flulo sanguinto.
COMPOSICION DEL FILTRADO
Los capilares glomerulares son impermeables a las proteinas. Carece de proteinas y elementos celulares, Incluyendo los eritrocitos.
El calcio y los ácidos grasos estan ligados a proteinas plasmáticas por lo que no se filtran libremente.
FIUSO PLASMETICO
① Equilibrio entre las fuerzas hidrostáticas y cololdosmóticas.
② El coeficiente de filtracioncapilar, el producto de la permeabilidad por el area superficial del filtro de los
CAPILaVeS.
FG normal 125m1/ min o 1801/ dia. La fraccion de fluso Plasmático renal que se filtra alrededor del 20% del Plasma que
fluxe a traves del vinión se filtra por capilares glomerolares.
MEMBRANA c A p1 A R
① Endotelio del capilar ->
Perforando fenestraciones que dificultan el paso de Proteinas plasmáticas.
② Membrana basal Red de colageno y fibrillas de proteoglucanos por el que pasan agua y soluto.
->
③ Capa de celulas epiteliales (Podocitos) -
Superficie externa del glomerulo. Los podocitos están
separados por poros en hendidura por los que se muere el filtrado glomerular.
las capas de la pared capilar glomerular proporcionan una barrera a la filtracion de
las proteinas plasmáticas.
Capacidad de Filtracion por el tamaño
la membrana capilar filtra liquido con mayor intensidad. La barrera de filtración
glomerolar filtra de modo selectivo las moléculas basandose en su famano y en su carga.
los electrolitos como el sodio y compuestos orgánicos pequeños como glucosa se filtran
libremente.
Moleculas con carga negativa se filtran con menor facilidad que las de carga positiva.
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