Endocytosis

Definition

Endocytosis is a cellular process in which substances are brought into the cell by engulfing them in a vesicle. This process allows cells to take in large molecules, particles, or even other cells.

5 Must Know Facts For Your Next Test

1. Endocytosis can be classified into two main types: phagocytosis (cellular eating) and pinocytosis (cellular drinking).
2. Receptor-mediated endocytosis involves the uptake of specific molecules based on receptor binding.
3. Endosomes are membrane-bound compartments that sort and direct internalized materials during endocytosis.
4. Viruses often exploit receptor-mediated endocytosis to enter host cells and initiate infection.
5. Pathogens can use endocytosis to evade immune detection by hiding within host cells.

Review Questions

Related terms

Phagocytosis:

A type of endocytosis where large particles, such as cells or debris, are engulfed by a cell.

Pinocytosis: A type of endocytosis where cells ingest extracellular fluid and its dissolved solutes.

Exocytosis: A cellular process where materials are expelled from a cell via vesicles fusing with the plasma membrane.