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Exocytosis:
In this process the membrane of a vesicle can fuse with plasma membrane and extrude its contents to the surrounding medium. This process is also named as cell vomiting.
Cells exhibit exocytosis to:

  • Remove the undigested residues
  • substances brought in by endocytosis.
  • Secrete substances such as hormones, enzymes
  • Transport a substance completely across a cellular barrier.