T Muscular Flashcards

1
Q

SARCOMERO

A

Unidad estructural de la miofibrilla

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2
Q

Formacion SARCOMERO

A

-entre 2 lineas Z sucesivas
-polo + del filamento de actina: linea Z
-polo -: linea M
-banda I (clara): en linea Z - actina
-banda A (oscura): en linea M - actina y miosina
1/2 I + A + 1/2 I

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3
Q

M ESTRIADO

A
  • células o fibras alargadas
  • polinucleadas (periferia)
  • und funcional: sarcomero
  • m esqueletico. ) ≠ localizacion
  • m cardíaco: ≠ núcleo central y único. )
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4
Q

Diferencias ESTRIADO y LISO

A

ESTRIADO. LISO
+++. +. Acidofilia
Con. Sin. Estrias
Densa/granular <3. Laxa. Cromat
Con. Sin. Sarcomero
Con./sin <3 Sin. Triadas
Sin./con <3 Sin. Diadas
Sin./con <3 Sin. Discos intercalares
Con. Sin. Tubulos T
+++. -. Reticulo sarcoplasmico
No. Si <3 Si. Uniones intercelulares
Si. No <3 No. Cisterna terminal

LISO: autonomo involuntario
ESTRIADO: somatico voluntario
CARDIACO: autonomo involuntario

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5
Q

TRIADA

A

3 tubos (2 cisternas terminales y 1 tubulo T)

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6
Q

M ESQUELETICO

A
  • und estructural y funcional: fibra
  • celula larga y multinucleada
  • nucleos aplanados, densa, periferia, longitudinal a fibra
  • tendon: t c denso modelado
  • vainas de t conect: permitem movimiento
  • citoplasma: glucogeno y lipidos
  • 1 fibra= miofibrillas
  • somatica voluntaria
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7
Q

Tejido conectivo MUSCULO

A
  • epimisio: rodea musc - t conect no modelado
  • perimisio: rodea fasciculo (vaina) - t c denso no modelado
  • endomisio: rodea fibra - t c laxo (+capilares)
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8
Q

Capas CORAZON

A

ENDOCARDIO: plano simple - t c denso
MIOCARDIO: t c laxo, vasos
EPICARDIO (pericardio visceral): plano simple (mesotelio) - t c laxo, t adiposo, vasos

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9
Q

FIBRAS DE PURKINJE tipo de celula

A

Son celulas musculares cardiacas modificadas

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