The process of phagocytosis initiates "antigen presentation" where the bacteria or foreign body has been engulfed within the cell and then presented extracellular so that further immune responses may occur.
The process that requires transport vesicles to transfer material out of a cell is called exocytosis.
Endocytosis and exocytosis involve the transport of molecules across a cell membrane using energy in the form of ATP. In endocytosis, cells engulf substances by creating vesicles, and in exocytosis, cells expel substances by fusing vesicles with the cell membrane. Both processes require energy to move substances against their concentration gradient, making them examples of active transport.
The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are "recognized" by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.
Endocytosis is the bulk transport of materials into a cell, using energy in the form of ATP. It is an active process, and the energy is used to move the membranes around the materials to form the vesicles that are needed, and to move the vesicles into the cell.
Exocytosis
Exocytosis
The process that requires transport vesicles to transfer material out of a cell is called exocytosis.
Exocytosis is the process where vesicles fuse with the plasma membrane to release substances outside of the cell. This mechanism allows cells to expel waste or deliver molecules to other cells.
Endocytosis and exocytosis involve the transport of molecules across a cell membrane using energy in the form of ATP. In endocytosis, cells engulf substances by creating vesicles, and in exocytosis, cells expel substances by fusing vesicles with the cell membrane. Both processes require energy to move substances against their concentration gradient, making them examples of active transport.
The plasma membrane surrounding animal cells is where the exchange of substances inside and outside of cells takes place. Some substances need to move from the extracellular fluid outside cells to the inside of the cell, and some substances need to move from the inside of the cell to the extracellular fluid.Some of the proteins that are stuck in the plasma membrane help to form openings (channels) in the membrane. Through these channels, some substances such as hormones or ions are allowed to pass through. They either are "recognized" by a receptor (a protein molecule) within the cell membrane, or they attach to a carrier molecule, which is allowed through the channels. Because the plasma membrane is choosy about what substances can pass through it, it is said to be selectively permeable.
Vacuoles, also called cytoplasmic vesicles. The Golgi Apparatus prepares and processes cytoplasmic vesicles for Cellular Export of translated proteins; cytoplasmic vesicles such as lysosomes, peroxisomes and proteosomes deal with the internal processing of cytoplasmic components.
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Endocytosis is the bulk transport of materials into a cell, using energy in the form of ATP. It is an active process, and the energy is used to move the membranes around the materials to form the vesicles that are needed, and to move the vesicles into the cell.
It is called exocytosis, which is defined as "a process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane." The opposite of exocytosis is endocytosis.
filtration
Exocytosis
Secretory vesicles can form from the Golgi apparatus, which packages proteins and molecules for secretion. These vesicles can also be formed from endosomes that have internalized molecules or from specialized secretory cells in the body. Once formed, secretory vesicles move towards the cell membrane for exocytosis to release their contents outside the cell.