Thursday, July 11, 2002


RETICULO ENDOPLASMATICO: El ret�culo endoplasm�tico es un sistema membranoso cuya estructura consiste en una red de s�culos aplanados o cisternas, s�culos globosos o ves�culas y t�bulos sinuosos que se extienden por todo el citoplasma y comunican con la membrana nuclear externa. Dentro de esos sacos aplanados existe un espacio llamado l�men que almacena las sustancias. Existen dos clases de ret�culo endoplasm�tico: R.E. rugoso (con ribosomas adheridos) y R.E. liso (libres de ribosomas asociados).
Su funci�n primordial es la s�ntesis de prote�nas, la s�ntesis de l�pidos constituyentes de membrana y la participaci�n en procesos de detoxificaci�n de la c�lula.

PBHS

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