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Exocytosis is used by a cell chiefly to

  • A.release secretory products to the outside
  • B.take up large particles from outside the cell
  • C.move ions against their concentration gradient
  • D.generate ATP for the cell's metabolic work

Answer: A

Correct answer: release secretory products to the outside

In exocytosis a vesicle fuses with the plasma membrane and discharges its contents outside - hormones, digestive enzymes, neurotransmitters, or the components of the extracellular matrix. It also delivers new membrane and new membrane proteins to the cell surface, which is the point the next item turns on.

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