What is the difference between endocytosis and exocytosis?
- Endocytosis is a cellular process by which cells internalize substances from their external environment.
- Exocytosis is a type of process, in which involves the movement of materials from the inside of a cell to the exterior of the cell by the use of energy.
|Definition||The process by which cells actively transport substances into a cell by engulfing them in a vesicle is known as Endocytosis.||The Process by which cells actively expel molecules out of the cell into the extracellular fluid is known as Exocytosis.|
|Function||Helps to absorb nutrients for efficient cellular functioning and eliminate pathogens and old or damaged cells.||Facilitates communication between cells, repairs cell membrane, and eliminates toxins and waste products.|
|Mechanism||During endocytosis, an endocytic vesicle is formed surrounding the foreign substance, which is either a solid or a liquid.||During exocytosis, the vesicle containing the waste is fused with the plasma membrane in order to eliminate its contents.|
|Pathway||Occurs over three pathways – phagocytosis, pinocytosis, and receptor-mediated endocytosis.||Occurs through three pathways – regulated, constitutive, and fusion of vesicles with lysosomes|
|Vesicles||A vesicle is formed around the foreign substance||Fused with the plasma membrane|
|Vesicles formation||Vesicle is formed from cell membrane. It then gets into the cytoplasm.||Vesicle is formed in the Golgi apparatus. It then fuses with the cell membrane.|
|Type of vesicle formed||Like phagosomes||Secretory Vesicles|
|Size of Cell membrane||It Decreases the size of the cell membrane.||It Increases the size of the cell membrane.|
|Examples||Engulfing bacteria by phagocytes is an example for endocytosis.||Releasing of hormones out of the cell is an example for exocytosis.|