chapitre 3 composition paroi Flashcards

1
Q

composantes de peptidoglycane

A

acide N-acétylmuramique
N-acétylglucosamine
acide aminé (chaine peptidique + pont interpeptidique)

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2
Q

rôle peptidoglycane

A

rigide + maintien forme de cellule
résistance chimique

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3
Q

gram +

A

paroi épaisse de peptidoglycane
membrane cytoplasmique

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4
Q

gram + acide

A

téchoïque et lipotéchoïque
maintien structure de la paroi

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5
Q

TA

A

dans la paroi

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6
Q

LTA

A

lié à membrane

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7
Q

gram + protéines membranaires

A

dans membrane cytoplasmique
permettent de réagir à l’environment

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8
Q

gram -

A

membrane externe
périplasme
membrane interne

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9
Q

membrane externe gram -

A

même chose que membrane cytoplasmique

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10
Q

périplasme gram -

A

milieu liquide entre 2 membranes
enzymes
synthèse de paroi
réactions enzymatiques

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11
Q

peptidoglycane gram -

A

dans périplasme
très mince

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12
Q

lipopolysaccharide gram -

A

ancré membrane externe
lipide A
noyau polysaccharidique
polysaccharide O

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13
Q

lipoply rôle

A

stabilise membrane externe
empêche activation complèment

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14
Q

complément

A
  • protéines foie
  • système immunitaire
    perce trous dans membrane bact + cible bact pour phagocytose
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15
Q

lipide a

A

endotoxine
libéré par lyse
réponse immun exagérée
+++ pouls + hyperventilation

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16
Q

protéines membranaires gram -

A

interne + externe
porines (canaux protéiques)
transporte mol non séléctif