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Golgi Apparatus

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Elizabeth Schiesser

on 23 February 2014

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Transcript of Golgi Apparatus

Golgi Apparatus
Elizabeth Schiesser
The Golgi apparatus is one of many organelles found in all eukaryotic cells.
The Golgi body is made up of any number of disconnected flattened sacs, also known as cisternae. The number of stacks ranges from a few to hundreds. The number of stacks is directly related to how active the cell is in secreting proteins, the more active the cell, the more stacks.
The Golgi apparatus is an important part of the endomembrane system, without it, all other organelles within this system would be unable to function. Vesicles from the ER fuse to the closet Golgi membrane called the cis-Golgi. Molecules travel through the Golgi apparatus until they reach the farthest membrane, the trans-Golgi. As this is occurring, the substances within the vesicle are sorted, modified, and packaged.
transport vesicle
secretory protein
Golgi apparatus receives a transport vesicle from the rough ER
Golgi apparatus sorts substances
Golgi apparatus modifies sorted substances
Golgi apparatus packages sorted and modified proteins to be sent to their destination
After being packaged the transport vesicle is directed to its appropriate destination: the plasma membrane or a lysosome.
When producing a lysosome, the Golgi body uses enzymes from the rough ER.
The transport vesicle from the rough ER enters the cis Golgi, where is undergoes a series of chemical reactions. A fully mature lysosome is then released from the trans face.
Golgi Apparatus
incoming transport vesicle
cis face
outgoing transport vesicle
trans face
Without lysosomes, the cell would be unable to break down materials, and without the Golgi body, there would be no lysosomes.
Without the Golgi body the cell would die.
The Golgi apparatus is a part of the endomembrane system, located just outside of the endoplasmic reticulum.
plant cell
animal cell
When a transport vesicle reaches the plasma membrane it will either fuse with the plasma membrane or exit the cell in a process known as exocytosis.
endoplasmic reticulum
cell membrane
creation of lysosomes
The Golgi apparatus is like the mailman of the cell. It receives "packages," then sorts them and sends them to their destination.
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