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Potencial de Acción - Neurotransmisores

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by

Elkin Vallejo

on 8 August 2013

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Transcript of Potencial de Acción - Neurotransmisores

Impulso Nervioso
-75mV
K+,Na+, Cl-
K+
K+
Na+
Na+
Cl-
Cl-
Potencial de Reposo
K+ interna 20 - 50 veces mayor
Cl- abundante afuera
Na+ Concentrada afuera
+
-
K+
Na+
Cl-
Cl-
Na+
K+
Potencial de Acción
Na+ aumenta 100 veces permeabilidad
-
+
1/2 ms
Canal de
Cerrado
Activo
Cerrado
Inactivo
Abierto
1/2 ms
Propagación
Sinápsis
Canales
de
Na+
Vaina
de
Mielina
Vainade Mielina
Nodo
de
Ranvier
Eléctrica
Química
Sinápsis
Neurotransmisor
K+, Cl-, Na+
Inhibitorio
-
+
Acetilcolina
Síntesis
Colina + Acetil CoA
Acetilcolina
Colina Acetiltransferasa
Degradación
Acetilcolinesterasa
Acetilcolina
Colina + Acetato
Química
Exitatorio
iones
Negativos (Cl-)
iones
Positivos (Na+,K+)
Sodio
Na/K
Bomba de
ATP
Na+
2
3
K+
Dopamina
Hormona
Neurotransmisor
Neurotransmisor
SN Central y periférico
favorece los procesos de memoria
ayuda a mantener la atención
activa los músculos esqueléticos
inhibe el movimiento del músculo cardiaco
contracción
muscular
Receptores de Acetilcolina
muscarínicos
nicotínicos
Full transcript