Exocytosis:

Exocytosis is a calcium dependent process. In non-constitutive exocytosis, secretory product after synthesis and processing in the RER and GA, is stored in the cytoplasm in secretory granules until an appropriate signal for secretion is received In constitutive exocytosis, prompt transpo of secretory product to the cell membrane in vesicles occurs with little or no processing or storage SNARE proteins that are involved in exocytosis