Here's how it works:
* Vesicles bud off from the ER: The ER, a network of interconnected membranes throughout the cell, produces proteins and lipids. These molecules are packaged into small, membrane-bound sacs called transport vesicles.
* Vesicles move to the Golgi: These vesicles then move towards the Golgi apparatus, a stack of flattened, membrane-bound sacs.
* Fusion and processing: The vesicles fuse with the Golgi membranes, delivering their contents into the Golgi lumen (the space within the Golgi sacs). As the molecules move through the Golgi stacks, they undergo further processing, modification, and sorting.
* Final destinations: Once processed, the molecules are packaged into new vesicles that bud off from the Golgi and are directed to their final destinations, such as the cell membrane, lysosomes, or secretion outside the cell.
Therefore, the Golgi apparatus is intimately connected to the ER and relies on its production of molecules and the transport vesicles to function properly.
