Class notes
La transmission synaptique
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Comment s’effectue La transmission synaptique chez l’humain
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La transmissionsynaptique
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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