Bulk transport
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Bulk transport
Bulk transport (pronounced: /bʌlk trænˈspɔːrt/) is a biological process that occurs in cells, allowing for the transport of materials such as proteins and polysaccharides across the cell membrane. The term originates from the Latin words 'bulkus' meaning 'large quantity' and 'transportare' meaning 'to carry across'.
Types of Bulk Transport
Bulk transport can be divided into two main types: Endocytosis and Exocytosis.
- Endocytosis (pronounced: /ˌɛndoʊsaɪˈtoʊsɪs/) is a process by which cells absorb molecules by engulfing them. This process is used by all cells because most substances important to them are large polar molecules that cannot pass through the hydrophobic plasma or cell membrane.
- Exocytosis (pronounced: /ˌɛksosaɪˈtoʊsɪs/) is the process by which cells move materials from within the cell into the extracellular fluid. This process is used to expel waste and to secrete substances produced by the cell.
Related Terms
- Phagocytosis (pronounced: /fæɡoʊsaɪˈtoʊsɪs/) is a type of endocytosis where a cell engulfs a solid particle to form an internal compartment known as a phagosome.
- Pinocytosis (pronounced: /ˌpaɪnoʊsaɪˈtoʊsɪs/) is a mode of endocytosis in which small particles are brought into the cell, forming an invagination, and then suspended within small vesicles.
- Vesicle (pronounced: /ˈvɛsɪkəl/) is a small structure within a cell, consisting of fluid enclosed by a lipid bilayer.
See also
External links
- Medical encyclopedia article on Bulk transport
- Wikipedia's article - Bulk transport
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