cm2 Flashcards

1
Q

la peau a une surface de

A

2 m2

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2
Q

la lipoderme represente le stock d’…

A

adipocytes ce qui joue le role du stock d’energie

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3
Q

l’epiderme a pour epaisseur

A

0,1 - 0,5 mm

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4
Q

90% de keratinocytes se situent dans l

A

‘epiderme

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5
Q

4 types de cellules epitheliales:

A

keratinocytes - permeabilite selective
melanocytes - grandes, bruns
cellules de Langerhans - immunite
cellules de Merkel - neuroepitheliales

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6
Q

couches epitheliales

A
l'epiderme:
corneum
lucidum
granulosum
spinosum
basales
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7
Q

lame basale est

A

purement proteique

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8
Q

corneum -

A

keratinisee, 15-20 couches, pas de fonction metabo, sans les organites, desquammation, profilagrine -> filagrine

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9
Q

lucidum -

A

tres compacte, reflechissante

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10
Q

granulosum -

A

commence a degenerer, la cellule s’aplatie

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11
Q

a epines, spinosum -

A

polygonaux, + corps cellulaires des melanocytes, les vacuoles keratinosomes

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12
Q

basale

A

cellules souches, desmosomes, Merkel

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13
Q

desmosomes se trouvent entre

A

l’epiderme et la derme

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14
Q

les keratinosomes seront

A

exocytees

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15
Q

les melanocytes proviennent de

A

cretes neurales

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16
Q

les m-cytes forment

A

5-10% de l’epiderme

17
Q

eumelanine

A

noir

18
Q

pheomelanine

A

jaune, rouge

19
Q

TTTyrosinase apparait au stade

A

stade 3 TTTrois

20
Q

le derme a 2 types

A

reticulaire- dense- epais, elastine, collagene

papillaire comme le papillon- papilles, cretes, depression importante