exocytosis
exocytosis
Noun
This term describes a specific biological mechanism of bulk transport. It is characterized by the active movement of materials from the interior of a cell to the exterior, specifically through the merging of an internal vesicle with the cell membrane. This process is vital for the secretion of hormones, neurotransmitters, and digestive enzymes.
As a technical scientific term, it is used almost exclusively in academic, medical, and biological contexts. It is the direct functional opposite of endocytosis. Because it refers to a specific physiological process, it is treated as an uncountable noun and does not typically take a plural form in standard scientific discourse.