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ue3 > membranes > Flashcards

membranes Flashcards

1
Q

nomme 2 procaryotes

A

archeobacteries + eubacteries

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2
Q

decris mb des procaryotes

A

on a mb cytoplasm, apres paroi + peptidoglycanes, mb externe (capsule) + pollysacch

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3
Q

decris comment se passe la coloration Gram

A

crystal violet + lugol +alcool + fuschine

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4
Q

Gram + sont

A

violettes

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5
Q

Gram + a

A

paroi epaisse + homogene

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6
Q

Gram - sont

A

roses

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7
Q

Gram - ont

A

paroi - epaisse
heterogene
irregulier

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8
Q

Il existe … types de mb:

A

plasmique + imtermes des organites

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9
Q

epaisseur d’une mb est

A

7,5 nm

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10
Q

les lipides mb

A

phospho, glycolipides

sterols

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11
Q

glycerophospholipides

A

alcool + phosphate + glycerol + 2 ag

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12
Q

PE et PC

A

neutres

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13
Q

PI et PS

A

chargees

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14
Q

spingophospholipides

A

choline + phosphate + spingosine + 1 ag avec 2 ramifications

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15
Q

glycolipides: 2 types

A

glyceroglycolipides + sphingoglycolipides

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16
Q

glyceroglycolipides sont produits par reaction

A

d’esterification d’ag par des oses/sucres amines

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17
Q

glycolipides sont … abondants

A

peu

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18
Q

on synthetise les glycolipides dans

A

golgi

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19
Q

dans les sphingoglycolipides, on a

A

2 oses + sphingosine + 2 ag

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20
Q

cholesterol est present chez les animaux et pas chez les vegetaux et les bacteries

A

VRAI

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21
Q

cholesterol represente

A

1/4 des lipides mb

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22
Q

noyau steroide est

A

hydrophobe

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23
Q

queue est

A

hydrophobe

24
Q

fonction alcool est

A

hydrophile

25
Q

les proteines integrales sont aussi appeles

A

intrinseques

26
Q

feuillets beta sont les

A

canaux

27
Q

les +++ helices alpha sont

A

enzymes, transporteurs, rc

28
Q

helices alpha sont

A

rc

29
Q

GPI est

A

intrinseque externe

30
Q

les proteines peripheriques sont qussi appeles

A

extrinseques

31
Q

le glycocalyx: fonctions

A

rigidifie
protege
reconnait

32
Q

antigene A contient

A

NAGA (on a 2 A - antigene A)

n-acetyl-galactosmine

33
Q

antigene B contient

A

GAL

34
Q

groupe sanguin A est caracterise par

A

antigene A

anticorps B

35
Q

groupe B

A

gene B corps A

36
Q

groupe AB

0

A

antigenes AB
aucun anticorps
inverse pour o

37
Q

mb externe: alcools

A

choline, serine

38
Q

mb interne

A

ethanolamine, serine

39
Q

diffusion transversale est

A

lente et rare

40
Q

la rotation des tetes est +++

A

rapide

41
Q

Dif simple concerne uniquement les molecules liposolubles hydrophobes et les petites molecules polaires non chargees comme O2, N2, CO2, vit ADEK, uree, ethanol, glycerol

A

vrai

42
Q

diffusion simple est non saturable

A

vrai

43
Q

diffusion facilitee concerne

A

molecules hydrophiles polaires

44
Q

diff fac est + rapide et efficace. Elle est

A

saturable

45
Q

les canaux ioniques: 3 types

A

de fuite, pores
voltage
ligand dependants

46
Q

les transporteurs uniport sont

A

passifs

47
Q

uniports ont structure d’

A

helices alpha

48
Q

Glut1 et present au

A

GR + cerveau
forte affinite
Km faible

49
Q

Glut2

A

cellules hepatiques, pancreatiques beta, rein
faible affinite
Km fort

50
Q

hypotonique

A

hemolyse
turgescence
heme

51
Q

hypertonique

A

plasmolyse (+ de lettres)

plasme

52
Q

porines

A

de grande taille

53
Q

dans les pompes primaires, on transporte

A

2 K et 3 Na

циТРИ На

54
Q

cotransporteurs n’utilisent pas

A

ATP

55
Q

phagocytose est spe aux

A

macrophages, cellules dendritiques, monocytes, neutrophiles

56
Q

LDL pour cholesterol sont

A

lipoproteines de FAIBLE densite

57
Q

Pinocytose est characteristique pour le transport des

A

LDL et fer par transferrines

ue3 (2 decks)

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