Question

What are endocytosis and exocytosis? When are they used?

Answer 1

Endocytosis is the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane, and bringing it into the cell. Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell.

Endocytosis is used for receptor signaling, nutrient uptake, membrane remodeling, pathogen entry, and neurotransmission, as well as modulating cell signaling responses. In developing tissues, it has been found that endocytosis aids in cell migration.

Exocytosis is used continuously by plant and animal cells to excrete waste from the cells.

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Answer 2

Endocytosis and exocytosis are the processes by which cells move materials into or out of the cell that are too large to directly pass through the lipid bilayer of the cell membrane