The endoplasmic reticulum is an extension of the
copy-related membrane that forms the flat duct or tube-like hole in the
cytoplasm. In observation microscope, looks like the RE wavy serpentine channel
and mesh hollow-cavity. These channels serve to help move substances from one
part of the cell to the other cells. In the cell there are two types of
endoplasmic reticulum (ER) is the rough endoplasmic reticulum and smooth
endoplasmic reticulum.
1. rough endoplasmic reticulum
Seized the rough endoplasmic reticulum because the
surface covered by the ribosome so it looked like a long strand of sand paper.
Ribosomes are the site of protein synthesis. Proteins are synthesized on
ribosomes attached to the endoplasmic reticulum is usually indicated for the
outside of the cell,
After the completion of proteins made by ribosomes
on the surface of the endoplasmic reticulum, the protein spatial transported in
the endoplasmic reticulum. In this channel protein may be modified by an enzyme
present on the surface of the membrane of the endoplasmic reticulum. If the
protein has reached the end of the endoplasmic reticulum, the protein is stored
in small membrane-containing vesicles. Vesicles formed from slices of smooth
endoplasmic reticulum associated with the rough endoplasmic reticulum.
Thus, the function of the rough endoplasmic
reticulum in supports protein synthesis and distribute genetic material between
the cell nucleus to the cytoplasm.
2. The smooth endoplasmic reticulum
Smooth endoplasmic reticulum ribosomes so surface plastered smooth. Smooth endoplasmic reticulum have enzymes in
permukannya which serves for the synthesis of lipid, glycogen, and steroi
compounds such as cholesterol, glycerides, and hormone.
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