Contraction Musculaire Flashcards

Muscle

1
Q

Structure

A

Fibres regroupées en faisceaux

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2
Q

Synapse musculaire

A

Neuromediateur = ACH

Récepteur : canaux Na+

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3
Q

Fibres musculaire

A

Assoc de cellule musculaire

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4
Q

Myofibrilles

A

Actines/myosine en alternance

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5
Q

Fibres musculaire

A

Plusieurs noyaux
Mitochondrie
RE développer
Invaginations

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6
Q

Mécanisme

A

Myosine tete se lie à lactine –>ions phosphate–> motif myosine –> avancer par rapport à lactine
ATP

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7
Q

Muscle ❤

A

Reliés grâce à un tissu conjonctif

Disque intercallR: propagation et synchro

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8
Q

Disque intercalR

A

Zone de contact, relation cyto

Adhérence et cohésion des fibres

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9
Q

Muscle ❤

A

PA–> noeud sino- auriculR, module par noeud auriculo ventricule, transmis à his et purkinge

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10
Q

Cellule pacemaker

A

Ç ❤ rythmé
Autonome
Depo: entree de na+, sortie K+ et hop PA

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11
Q

Muscle lisse

A
Contraction lente
Syst nerveux autonome
Faisceaux
Actine/myosine pas alignés 
Tte direction
Bcp de mito 
Rs + devel
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