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La transmission synaptique

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Comment s’effectue La transmission synaptique chez l’humain

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La transmission
synaptique
Comment 2 neurones
communiquent entre eux ?
les
synapses
1mm de substance 5 milliard de
grise x
synapses




Et ← dendrite Homa
↳E-¥:
s-




|
- -
- -



a:X - -
-




-1 T
élément pré synaptique
-




terminaison de l' axone qui envoie le signal
f - element post synaptique
dendrite lsoma du
-




neurone
qui reçoit le signal
fente synaptique




LA SYNAPSE ELECTRIQUE
Faible espace entre éléments et post synaptiques (2 à 4 )
pré nm
- -




les f-

passage
direct du
signal électrique via
jonctions communicantes
gap jonction ) qui
sont des canaux ioniques spéciaux
membrane pré stratiome


ÆÆÆË#
-




-
- -




gap jonction
LES AVANTAGES
-




Communication +
rapide que dans une
synapse chimique
-

Permettent de synchroniser l' activité d' un groupe de neurone / de fibres musculaires (contractions abdominales
l' accouchement )
Permet transmettre dans les 2
pendant
-


au
signal de se sens

communication bidirectionnelle ( 0 )
synapse chimique

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Written in
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