Index >> Membrane Transport >> Bulk Transport

2. In outward membrane perforation, intracellular substances can be expelled from the cell through a temporary membrane pore, e.g. defecation in amoebae, during which indigestible food particles are ejested from the cell

(B) Cytosis includes three main types of transport, endocytosis, intracytosis and exocytosis. These processes involve either decrease in membrane area (negative Cytosis) or increase (positive Cytosis).

During negative Cytosis an area of the membrane is pinched off, while in positive Cytosis membrane is added

(2)Intracytosis.The term intracytosis has been used to describe intracellular processes of membrane vesiculation. Positive intracytosis includes vacuole fusion, cell plate formation, formation of secondary endosomes and formation of large secondary endosomes.

Negative intracytosis includes such processes as the formation of Golgi vesicles, secondary micro pinocytosis and the formation of small secondary endosomes.