Answer the following question given this paragraph: 

Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell, as shown in Figure below . Exocytosis occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin. Newly made membrane proteins and membrane lipids are moved to the plasma membrane by exocytosis.


Q: What describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell?

 Choices:

- autolysis

- endocytosis

- expulsion

- exocytosis

A:
exocytosis
