Arrange the following events of exocytosis in the correct sequence: (1) vesicle membrane fuses with plasma membrane (2) secretory vesicles migrate to plasma membrane (3) vesicle contents are expelled from cell (4) secretions accumulate within secretory vesicles

The correct sequence is: (4) secretions accumulate within secretory vesicles, (2) secretory vesicles migrate to plasma membrane, (1) vesicle membrane fuses with plasma membrane, (3) vesicle contents are expelled from cell.

Explanation:

Exocytosis is a transport process that involves vesicles or vacuoles. In this process secretion compounds accumulate within the vesicle, and migrates toward the plasmatic membrane. Once the vesicle reaches the cellular surface, its membrane fuses with the cellular membrane and its content are expelled from the cell to the exterior.  

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