Physio chap 1 Flashcards

1
Q

Membrane

A

Interface entre 2 compartiments ≠

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2
Q

Mb hémiperméable

A

Ne laisse passer que l’eau

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3
Q

Mb dialysante

A

Laisse passer eau, petites molécules dissoutes et macromolécules dont la masse molaire < 10 000 g/mol

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4
Q

Mb sélective

A

Laisse passer que certains solutés

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5
Q

Point de coupure

A

= cut off = seuil de la mb

masse molaire au-dessus de laquelle ø transfert n’est possible

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6
Q

Porosité K

A

K = aire totale pores / aire totale mb

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7
Q

Coeff de réflexion 𝞼

A

𝞼 = aire pores imperméables au soluté / aire totale des pores

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8
Q

𝞼 = 1

A

Taille soluté > Taille pores

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9
Q

𝞼 = 0

A

Taille soluté < Taille pores

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10
Q

0 < 𝞼 < 1

A

Taille soluté très proche de la taille moyenne des pores

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11
Q

Aire totale des pores perméables au soluté

A

(1-𝞼) . K . S

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12
Q

Flux conservatif

A

ø accumulation de soluté au sein de la mb

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13
Q

3 types de transport passif

A

Diffusion, migration électrique, convection

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14
Q

Diffusion

A

Due à l’agitation thermique et au gradient de concentration

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15
Q

Migration électrique

A

Force intérieure, gradient de potentiel

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16
Q

Convection

A

Force extérieure

Si gradient de pression, on parle de filtration

17
Q

Concentration massique

A

SI : kg / m^3
usu : g/L
Cm = m/V

18
Q

Concentration molaire = molarité

A

SI : mol / m^3
usu : mol / L ou mmol / L
C = n / V = m / (M xV) = Cm / M

19
Q

Concentration molale = molalité

A

SI : mol / kg
usu : mol / L d’eau ou mmol / L d’eau
Cmolale = n(soluté) / m(solution
= m(soluté) / [m(solution) x M(soluté)]

20
Q

Concentration osmolaire = osmolarité

A

SI : osm / m^3
usu : osm / L ou mosm / L
Cosm = C x P
avec P le nb de particules en solution

21
Q

Concentration osmolale = osmolalité

A

SI : osm / kg
usu : osm / L d’eau ou mosm / L d’eau
Cosmolale = Cmolale x P
avec P le nb de particules en solution

22
Q

Concentration équivalente

A
SI : Eq / m^3
usu : Eq / L ou mEq / L
Ceq = (Cm / M) x Z
= C x Z
avec Z le nb de charge en solution, la valence de l'ion