Final answer:
The movement of vesicles in and out of the Golgi complex is controlled by specific proteins and membrane fusion events.
Step-by-step explanation:
The movement of vesicles in and out of the Golgi complex is controlled by specific proteins and membrane fusion events. Vesicles bud from the endoplasmic reticulum (ER) and fuse with the cis face of the Golgi apparatus. Within the Golgi, proteins and lipids undergo further modifications and are sorted into different vesicles. These vesicles then bud from the trans face of the Golgi and move to their proper destinations, either within the cell or outside the cell by fusing with the plasma membrane.