Final answer:
The regulated and constitutive pathways of exocytosis diverge at the point of release of the secretory vesicles' contents.
Step-by-step explanation:
In exocytosis, the regulated and constitutive pathways diverge at the point of release of the secretory vesicles' contents. In the regulated pathway, the release of substances from the vesicles is triggered by specific events or signals. An example of regulated secretion is the release of histamine by immune cells in response to the presence of foreign objects or pathogens. On the other hand, constitutive secretion involves the continuous release of soluble proteins from the cell.