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Pinocytosis Definition. Pinocytosis is the method by which a cell absorbs small particles outside the cell and brings them inside. The word pinocytosis comes from the Greek for “cell drinking”.
In cellular biology, pinocytosis, otherwise known as fluid endocytosis and bulk-phase pinocytosis, is a mode of endocytosis in which small molecules dissolved in extracellular fluid are brought into the cell through an invagination of the cell membrane, resulting in their containment within a small vesicle inside the cell.
Pinocytosis is an active, energy consuming process where extracellular fluid and solutes are taken up into a cell via small vesicles. It is a type of endocytosis, which refers to the uptake of substances by a cell. Phagocytosis and receptor-mediated endocytosis are other types of endocytosis.
The meaning of PINOCYTOSIS is the uptake of fluid and dissolved substances by a cell by invagination and pinching off of the cell membrane.
Pinocytosis is a type of endocytosis in which small particles suspended in the extracellular fluid are moved into the cell through pores formed on the cell membrane. The term pinocytosis is formed of two words “pino” and cytosis” where ‘pino’ means “to drink” while ‘cytosis’ means relating to the cell.
Pinocytosis, also known as fluid endocytosis, fluid-phase endocytosis, and bulk-phase pinocytosis, is defined as the process where a cell ingests tiny particles suspended in the extracellular fluid by forming an endocytic vesicle called a pinosome.
Pinocytosis or “cell drinking” is a crucial cellular process that involves ingesting liquid and dissolved solutes. The fluid typically includes fat droplets, nutrients, and sometimes antigens. In pinocytosis, cells “drink” fluids and dissolved molecules by closing pockets in the cell membrane.