# Capitulo Tres: Biología Célular

### Membrana de la Célula

| Este es una respresentacion de un fosfolipido simple. La estructura amarilla representa la “hydrophillic” o seccion de gusto por el agua del fosfolipido. Las colas azules que salen de la esfera respresentan la hidrofobia o miedo al agua en el parte final del fosfolipido. A coninuacion esta el modelo estructural de un fosfolipido que explica que significan estos terminos.

The two long chains coming off of the bottom of this molecule are made up of carbon and hydrogen. Because both of these elements share their electrons evenly these chains have no charge (gasoline is also a hydrocarbon). Molecules with no charge are not attracted to water; as a result water molecules tend to push them out of the way as they are attracted to each other. This causes molecules with no charge not to dissolve in water (this is why gasoline and water do not mix). At the other end of the phospholipid is a phosphate group and several double bonded oxygens. The atoms at this end of the molecule are not shared equally. This end of the molecule has a charge and is attracted to water. |

| Si se mezclan fosfolipidos en agua estos forman estas estructuras de doble capa. La parte terminal del “hydrophillic” estara en contacto con el agua. La parte terminal de la hidrofobia mirara hace adentro tocandosen una otra.

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