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During _____________, vesicles in the cell fuse with the cell membrane, releasing their contents to the outside.

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During exocytosis, vesicles in the cell  fuse with the cell membrane, releasing their contents to the outside. 

It involves the movement of an intra cellular  vesicle  to the plasma membrane, then fusion.

There are many cellular processes that involve exocytosis. These include:

1.release of neurotransmitters from presynaptic neurons

2. secretion of enzymes, peptides hormones and antibodies from cells.

3. Placement of integral membrane proteins

4. Antigen presentation during an immune response.

5. acrosome reaction during fertilization.

6. Recycling of plasma membrane bound receptors

 

Answer:

The correct answer would be exocytosis.

Exocytosis is a type of cell transport in which molecules or substances are transported from inside the cell to the outside environment with the help of vesicles.

Steps for the basic process can be written as:

  1. The vesicle containing the cargo molecules or substances is transported from within the cell to the plasma membrane.
  2. The membrane of vesicle then fuses with the membrane of the cell.
  3. The fusion results in the release of contents outside the cell.

Thus, the given blank can be correctly filled with exocytosis.

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