lipides Flashcards

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1
Q

caractéristiques lipides

A

non polaires et insolubles
2e source d’énergie
CHO
longues chaînes de C

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2
Q

types de lipides

A

tryacylglycérol (triglycérides)
phosphoglycérolipide
stéroïde

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3
Q

types de triacylglycérols

A

graisses (liaisons simples et saturés en H)

huiles (liaisons doubles et insaturés)

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4
Q

fin des acides gras

A

carboxyle (CHO2)

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5
Q

types d’acides gras insaturés

A

cis (gros angle)

trans (décalé)

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6
Q

structure triacylglycérol

A

glycérol + 3 acides gras

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7
Q

structure phosphoglycérolipide

A

glycérol + 1 acide gras saturé + 1 acide gras insaturé (isomère cis) + groupement phosphate

tête hydrophiles
queues hydrophobes

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8
Q

fonction des phosphoglycérolipides

A

membranes

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9
Q

membrane fluide vs visqueuse

A

visqueuse: collés
fluide: séparés

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10
Q

structure stéroïdes

A

noyau stérol

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11
Q

lipides dans l’alimentation

A

graisses neutres (triacylglycérol): énergie, tissu adipeux

phosphoglycérolipides: membranes cellulaires

stéroïdes : cholestérol, vitamines, sels biliaires

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