cap 08-muscular
TRANSCRIPT
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2 TRIADA
RETICULO
SARCOPLASMICO
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DENSO IRREGULAR Y COLAGENOSO
(FASCICULOS) LAXO
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UNION
MIONEURAL
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PERIMISIO
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IRRIGACION DE UNA FIBRA MUSCULAR
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MIOTUBOS
FIBRA MUSCULAR
MUSCULO
ESQUELETICO
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MUSCULO ESQUELETICO
Y SU MATRIZ
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P
E
R
I
M
I
C
I
O
ENDOMISIO FIBRAS RETICULARES Y UNA LAMINA BASAL TEJIDO
CONECTIVO LAXO
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MUSCULO ESQUELETICO
JUNTO A GLANDULAS
MUCOSAS
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LAS MIOFIBRILLAS SE CONSERVAN
EN SU POSICION GRACIAS A LA
DESMINA Y VIMENTINA ADEMAS
SON UNIDAS AL SARCOLEMA POR
LAS DISTROFINAS
REPARADA POR CELULAS
SATELITE QUE TIENEN
FUNCION REGENERATIVA
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B
A
N
D
A
A
B
A
N
D
A
I
D
I
S
C
O
Z
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MIOFIBRILLA
SARCOSOMAS
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SOLO
GRUESOS
INTERCALADOS
TANTO GRUESOS
COMO DELGADOS
SOLO
DELGADOS
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Miomesina y
proteína g conservar
la posición de los
gruesos
LA ORGANIZACIÓN
ESTRUCTURAL DE LAS
MIOFIBRILLAS SE CONSERVA
GRACIAS A TRES PROTEINAS:
TITINA, ACTININA ALFA Y
NEBULINA
TITINA: ELASTICA, LINEAL Y
GRANDE DESDE EL DISCO Z
VAN A FIJAR AL FILAMENTO
GRUESO
ACTININA ALFA: MANTIENE EN
ORDEN LOS FILAMENTOS
DELGADOS
NEBULINA: LARGA NO
ELASTICA AYUDA A LA
ACTININA ALFA A FIJAR LOS
FILAMENTOS DELGADOS
TROPOMIOSINA OCULTA LOS
SITIOS ACTIVOS DE LA ACTINA
TROPONINA CONTIENE 3
POLIPEPTIDOS GLOBULARES
TnT, TnC Y TnI (PAG 161)
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AMBOS
FILAMENTOS
BANDA A
SOLO
GRUESOS
BANDA H
SOLO
DELGADOS
BANDA I
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MUSCULO CARDIACO
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MUSCULO CARDIACO:
NUCLEO CENTRICO Y DE SOLO 1 O 2 DISCOS
INTERCALARES MISMO SISTEMA DE BANDAS
QUE EL ESQUELETICO
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MUSCULO
CARDIACO
DISCOS INTERCALARES
UNIONES ADHERENTES Y
UNIONES DE DESMOSOMAS
POSEE CALCIO EN SU
MATRIZ EXTRAT. DEBIDO A
SU RETICULO
SARCOPLASMICO
INCOMPLETO ADEMAS DE SU
SISTEMA DE DIADA EN VEZ
DE TRIADA
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DISCO
INTERCALAR
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MUSCULO CARDIACO NO SE
PUEDE REGENERAR EN VEZ
DE ESTO SE CREA UN TEJIDO
CONECTIVO FIBROSO
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CORTE TRANSVERSAL DE
MUSCULO CARDIACO
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CORTE TRANSVERSAL DE
MUSCULO CARDIACO
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CORTE TRANSVERSAL DE
MUSCULO CARDIACO
ENDOCARDIO
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UNIONES DE
INTERSTICIO
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UNION
ADHERENTE
DESMOSOMA
UNION
ADHERENTE
DESMOSOMA
UNION DE INTERSTICIO
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MUSCULO LISO
SOLO POSEE ENDOMISIO NO POSEE TUBULOS T ES INVOLUNTARIO
Y SE DIVIDE EN DOS TIPOS DE MUSC. LISO:
MULTIUNITARIO (SOLO UNA CEL INERVADA) Y UNITARIO (UN
CONJUNTO DE CEL. INERVADAS)
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MUSCULO LISO
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MUSCULO LISO
CAPILAR
EL PRODUCE SU
MATRIZ
CADA CELULA
MUSCULAR ESTA
RODEADA DE UNA
LAMINA EXTERNA
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CORTE TRANSVERSAL
DE MUSCULO LISO
NO POSEE TROPONINA, POSEE DESMINA Y
VIMENTINA EN EL MUSCULO UNITARIO Y SOLO
DESMINA EN EL MULTIUNITARIO
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CORTE TRANSVERSAL
DE MUSCULO LISO
EL RETICULO SARCOPLASMICO FALTANTE ESTA SUSTITUIDO POR CAVOLAS
(VESICULAS SARCOLEMALES) PARTICIPAN EN LIBERACION Y SECUESTRO DE
Ca
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LA TROPONINA C VA A SER
SUSTITUIDA POR LA
CALMODULINA EN EL
MUSCULO LISO SOBRE LA
ADHESION DE Ca
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CELULA
MUSCULAR
LISA
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NEXOS
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UNA CELULA DE
MUSCULO LISO
NUNCA PIERDE LA
CAPACIDAD DE LA
MITOSIS