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Biofísica > Célula Cradiaca > Flashcards

Célula Cradiaca Flashcards

1
Q

Cronotropismo

A

Capacidad de la fibvra cardiaca de - marcapasos

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2
Q

Dromotropismo

A

Sistema de conducción de la fibra - cardionector

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3
Q

Inotropismo

A

ACortamiento de la fibra , CONTRACTIL

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4
Q

Lusitropismo

A

Relajación de la fibra

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5
Q

Discos intercalados

A

Unene las células mandando información de un lado a aotro

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6
Q

Desmososmas

A

Glucoproteínas unidas a células vecinas
impiden la separación durante contracción

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7
Q

fascia adherens

A

Proteínas que anclan a la actina a la membrana

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8
Q

Gap junctions

A

forman canales que permiten al difusión de iones

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9
Q

Túbulo T

A

Invaginación de la membrana alineada con la línea z (proteínas contráctiles)
ACUMULA CA CANALES TIPO L

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10
Q

Mitocondrias

A

30-40% de capacidad
erobica

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11
Q

Línea Z

A

iofibrillas que delimitan el sarcómero

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12
Q

Bandas l:

A

a un lado de las z, filamentos finos

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13
Q

Bandas A,

A

gruesos y oscuros
h

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14
Q

Bandas H

A

Espacio entre filamentos finos linea m

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15
Q

CONTRACCIONES

A

Sistole y diastole

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16
Q

Sístole

A

acortamiento de la fibra CONTRACCCIÓN
Ca dependiente

17
Q

Dístole

A

Elongación de la fibra RELAJACIÓN
ATP independiente

18
Q

sarcomero se acorta

A

enlaces cruados entre miosina y actina y se deslizan hacia adnetro
bandas l estrechan, lineas z se acercan

19
Q

sarcolema

A

membrana externa

20
Q

Retículo sarcoplasmático

A

rodea microfibrillas y almacena Ca

21
Q

Proteínas

A

Miosina
actina
titina
tropomiosina

22
Q

Miosina

A

velkocidad de hidrolizacion de atp determina frecuencia de enlaces cruzados
unen a Z por titina y teletonina
unen a actina por proteina c

23
Q

actina

A

unen a z proyectada a sarcomero por alfa-actinina y nebulete

24
Q

tropomiosina

A

unea al ca

25
Q

titina

A

larga y voluminosa
une miosina con z
contrae sistole y expande diastole

Biofísica (6 decks)

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