Renal physiology: fast and easy tubular reabsorption
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- Опубликовано: 22 июн 2021
- How urine is produced (glomerular filtration, reabsorption, and tubular secretion) is briefly described. The mechanisms of solute reabsorption via transcellular (transepithelial) and paracellular are described. The importance of the sodium gradient created by the Na / K ATPase in the mechanisms of cotransportation of glucose and anions with sodium, and in the countertransportation of H with Na in the apical membrane of the proximal tubule is explained. The Na, K, and Cl cotransporter (NKCC) and the Na-H antiporter of the apical membrane of the dilutor segment are shown. The permeability to urea and water throughout the nephron is explained. The effect of hormones on the reabsorption of water and solutes in the distal nephron develops: antidiuretic hormone (ADH), aldosterone, etc. The Starling forces involved in reabsorption are explained, such as the hydrostatic capillary and Bowman pressures and the oncotic or colloidosmotic capillary and Bowman pressures. In this context, the vital importance of low capillary pressure in peritubular capillaries as a determinant of net reabsorption pressure is highlighted. Finally, the concepts of plasma load, filtered load, maximum tubular transport and excretion threshold are developed. I share the link of my channel. / @mauriciogiuliodori
Maravilloso material, muchas gracias por compartir!
Gracias a vos por el mensaje Gloria!!! Saludos
Gracias por todos tus videos, Mauricio!!
Quería preguntar si puede ser que en el minuto 13 dijiste al revés o soy yo quien no entendió bien.
Dijiste que la presión capilar favorece la reabsorcion, ¿no sería que favorece la filtración?. Y el otro al revés también.
Saludos!!!
Hola Malena, sí, si tal cuál como vos decís: dije que "en los capilares peritubulared las proteínas plasmáticas favorecen la filtración", en vez de decir que: "favorecen la reabsorción". Lo había corregido cuando hice el subtitulado. Gracias Malena!!!