AP BIOLOGY

Detailed explanation-1: -Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell, as s hown in Figure below. Exocytosis occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin.

Detailed explanation-2: -Exocytosis is the fusion of secretory vesicles with the plasma membrane and results in the discharge of vesicle content into the extracellular space and the incorporation of new proteins and lipids into the plasma membrane.

Detailed explanation-3: -Exocytosis is the process by which a large amount of molecules are released; thus it is a form of bulk transport. Exocytosis occurs via secretory portals at the cell plasma membrane called porosomes.

Detailed explanation-4: -Exocytosis is a form of bulk transport during which large numbers of molecules are transported out of the cell. In exocytosis, a vesicle (a small, membrane-bound compartment) containing the molecules to be released fuses with the cell membrane, and the contents of the vesicle are expelled.

Detailed explanation-5: -Types of Exocytosis This action is performed by all cells. Constitutive exocytosis functions to deliver membrane proteins and lipids to the cell’s surface and to expel substances to the cell’s exterior. Regulated exocytosis relies on the presence of extracellular signals for the expulsion of materials within vesicles.