Apto Urinario Flashcards

1
Q

Unidad histologica RIÑON

A

Nefron

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2
Q

Unidad funcional RIÑON

A

Tubulo urinifero: nefron y tubulos colectores

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3
Q

Hormonas que interactuan en TUBULO URINIFERO

A

Angiotensina II: vasoconstriccion —> +presion arterial
Aldosterona: reabsorve Na y secreta K
ADH: aumenta reabsorcion h2o

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4
Q

Que es el TUBULO URINIFERO

A

Und funcional riñon

-nefron + tubulos colectores

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5
Q

BARRERA DE ULTRAFILTRADO o de filtracion glomerular, que es

A
  • filtra formacion de ultrafiltrado
  • formacion: endotelio del capilar (poro o fenestra), lamina basal del capilar, lam basal del podocito, ranuras de filtracion
  • membrana basal glomerular: lam rara externa, lamina densa, lam rara interna
  • tamaño menor o igual albumina
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6
Q

BARRERA DE ULTRAFILTRADO donde es

A

Espacio urinario o de Bowman

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7
Q

Maior molecula que atraviesa BARRERA DE ULTRAFILTRADO

A

Albumina

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8
Q

TUBULO CONTORNEADO PROXIMAL describir

A
  • +cantidad
    -pars contorneada: corteza
    -pars recta: medula
    Presenta ribete de cepillo: microvellos
    Luz sucia o ocupada
    -reabsorbe Na y Cl (transporte activo) y h2o
    -reabsorbe aa, glucosa, vitaminas
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9
Q

≠ TUB CONT PROXIMAL y DISTAL

A

Tub cont DISTAL tiene:

  • luz limpia
  • -cantidad
  • reabsorbe iones
  • sin ribete de cepillo
  • -acidof
  • +nucleos
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10
Q

APTO YUSTAGLOMERULAR que es

A

Conjunto de cels que rodean glomerulo

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11
Q

APTO YUSTAGLOMERULAR componentes/partes

A
  • arteriolas aferentes y eferentes
  • cel yuxtaglomerulares: musc lisas modific
  • macula densa
  • mesangio extraglomerular (Lacis o de Polkissen)
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12
Q

APTO YUSTAGLOMERULAR funcion

A

Producir y secretar RENINA

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13
Q

SIST RENINA-ANGIOTENSINA-ALDOSTERONA (SRAA): que es

A

Sistema enzimatico que lleva a generacion de angiotensina II para regulacion de presion arterial

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14
Q

SIST RENINA-ANGIOTENSINA-ALDOSTERONA (SRAA) describir

A

RIÑON → renina → angiotensinogeno (HIGADO) → angiotensina I → (PULMON) convertasa o ECA: enzima que converte angiotensina →
angiotensina II
•angiotensina II → VASOCONSTRICCION inmediato
•angiotensina II → SUPRARRENAL (mediato) → aldosterona → RIÑON → reabsorcion Na →→→ +P arterial

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15
Q

CORPUSCULO DE MALPIGHI o renal

A

Glomerulo renal + capsula de Bowman

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16
Q

ASA DE HENLE partes

A

DESC (pars recta proximal): sale h2o
ASC (pars recta distal o rama gruesa): sale iones
sin ≠ morfologicas

  • plano simple
  • nucleo alargado
  • cito acidof
17
Q

MACULA DENSA que es

A

Transicion entre porciones recta y contorneada del TUBULO DISTAL apoyada sobre glomerulo

18
Q

MACULA DENSA funcion

A

Censa [] de Na en TCDistal

19
Q

TUBULO COLECTOR

A

-NO NEFRON
-reabsorbe h2o (ADH) y Na (aldosterona)
-cambia pH de orina:
•secreta H+ (acido) y HCO3- (bicarbonato)

20
Q

VEJIGA tunicas

A

Mucosa: epit polimorfo, de transicion
Muscular: 3 capas m liso= longit int (LI) + circular med (CM) + longit ext (LE)
Serosa o adventicia: t c laxo + adipocitos, vasos, n

21
Q

URETER

A

-luz estrellada
Mucosa: epit polimorfo, transicion, urotelio (denso)
Muscular: 2 capas m liso= LI + CE
Adventicia o serosa (+mesotelio): t c laxo + vasos, n
-en retroperitoneo