Fisio ojo Flashcards

1
Q

Retina

A

Porción del ojo sensible a la luz

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2
Q

Conos

A

Visión en color

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3
Q

Bastones

A

Visión en blanco y negro y en la oscuridad

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4
Q

Fóvea

A

Región central de la retina, de mayor agudez visual. Constituida casi totalmente por conos con un cuerpo especialmente largo y delgado

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5
Q

Componentes de conos/bastones

A

1) Segmento externo: pigmento fotosensible
2) Segmeno interno
3) Núcleo
4) Cuerpo sináptico

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6
Q

Discos

A

Repliegues de mb de los segmentos externos. Local de incorporación de los pigmentos (como prots conjugadas transmb)

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7
Q

Segmento interno

A

Provedor de energia: mitocondrias

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8
Q

Cuerpo sináptico

A

Sinapsis con clulas horizontales y bipolares

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9
Q

Capa pigmentária de la retina

A

Melanina: impide la reflexión de la luz por todo el globo oculoar: visión NITIDA
Grandes cantidades de vitamina A

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10
Q

Rodopsina

A

Ectopsina+11-cis-retinal
Com a luz, cis passa a trans, que se começa a libertar da rodopsina: BATORRODOPSINA. Em nanos, esta degrada em LUMIRRODOPSINA. que passa a METARRODOPSINA I, e logo a METARRODOSPINA II. Excisão completa em ectopsina e todo-trans

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11
Q

Metarrodopsina II

A

AKA rodopsina activada.

Esrimula cambios electricos en los bastones y la transmisión de la imagen visual hacia el SNC

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