Filtrat et urine Flashcards

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1
Q

Filtrat (UD)

A

Urine en formation
De l’espace capsulaire au tubule collecteur

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2
Q

Urine de ou a ou

A

Des canaux papillaires au méat

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3
Q

Formation urine (FRS)

A

Filtration (corpuscule rénal)
Réabsorption (tubule rénal)
Sécrétion (tubule rénal)

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4
Q

Membrane de filtration (PS)

A

Passe pas : cellules sanguines et grosses protéines
Sinon : bris membrane

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5
Q

Pression nette de filtration formule (PP)

A

Pression minimale : 40, sinon pas de filtration
PNF = PHg-(POg + PHc)

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6
Q

Pression nette filtration composés (PHg POg PHc)

A

PHg = pression hydrostatique glomérulaire
POg = pression osmotique glomérulaire
PHc = pression hydrostatique corpuscule

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7
Q

Filtration glomérulaire régulation 2 Modes (IE)

A

Intrinsèque (locale)
Extrinsèque (systémique)

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8
Q

Mécanisme myogènes (baisse PA… vaso.. contraire si hausse)

A

Si baisse PA = vasodilatation artériole afférent = augmentation VS dans glomérule = augmentation DFG

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9
Q

Rétraction tubuloglomérulaire (contraire pour hausse)

A

Si baisse PA systémique = Pression nette filtration faible = débit lent = trop réabsorption = macula densa vasodilatation

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10
Q

Système rénine-angiotensine(R=A=A=A=A)

A

Rénine sécretée = aldostérone sécretée = Aldostérone favorise réabsorption sodium = appel d’eau = augm. PA

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11
Q

Facteur natriurétique auriculaire (FNA)

A

Dilatation artériole afférent = augm. DFG, augm. diurèse = Diminution VS = baisse PA

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