Biology 6th edition Brooker.pdf 5

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10 Terms

1

Modelo fluido-mosaico

Modelo que describe la estructura de las membranas biológicas como un mosaico de lípidos, proteínas y carbohidratos.

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2

Proteínas de membrana

Clasificadas como proteínas transmembranales, proteínas ancladas a lípidos y proteínas periféricas, que desempeñan funciones esenciales en la membrana.

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3

Difusión simple

Movimiento de una sustancia a través de una membrana de un área de alta concentración a una de baja concentración sin necesidad de proteína de transporte.

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4

Transporte activo

Movimiento de una sustancia a través de una membrana contra su gradiente de concentración, que requiere energía, como ATP.

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5

Ósmosis

Movimiento del agua a través de una membrana para equilibrar las concentraciones de soluto.

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6

Endocitosis

Proceso en el cual la membrana plasmática se invagina para formar una vesícula que introduce sustancias en la célula.

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7

Exocitosis

Proceso en el cual las vesículas dentro de la célula se fusionan con la membrana plasmática para liberar su contenido al exterior.

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8

Gradientes electroquímicos

Diferencias en la concentración de iones a través de una membrana, que afectan el movimiento de solutos.

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9

Proteínas canal

Proteínas transmembranales que forman un pasaje abierto para la difusión facilitada de iones o moléculas.

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10

Cotransportadores (simporte y antiporte)

Transportan dos o más solutos simultáneamente, ya sea en la misma dirección (simporte) o en direcciones opuestas (antiporte).

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