Secretion

Secretion is the process of elaborating, releasing, and oozing chemicals, or a secreted chemical substance from a cell or gland. In contrast to excretion, the substance may have a certain function, rather than being a waste product. The classical mechanism of cell secretion is via secretory portals at the cell plasma membrane called porosomes. Porosomes are permanent cup-shaped lipoprotein structure at the cell plasma membrane, where secretory vesicles transiently dock and fuse to release intra-vesicular contents from the cell.

Secretion in bacterial species means the transport or translocation of effector molecules for example: proteins, enzymes or toxins (such as cholera toxin in pathogenic bacteria for example Vibrio cholerae) from across the interior (cytoplasm or cytosol) of a bacterial cell to its exterior. Secretion is a very important mechanism in bacterial functioning and operation in their natural surrounding environment for adaptation and survival.

Read more about SecretionSecretion in Gram Negative Bacteria, Secretion in Gram Positive Bacteria

Other articles related to "secretion":

Critical Illness-related Corticosteroid Insufficiency - Physiology
... In acute states of severe stress, cortisol secretion by the adrenal gland increases up to sixfold, parallel to the severity of the condition ... This is partly due to an increased secretion of corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH) ... The secretion also loses its normal diurnal pattern of morning peak levels and evening and night time troughs ...
Glucagon-like Peptide-1 - Physiological Functions
... The known physiological functions of GLP-1 include increases insulin secretion from the pancreas in a glucose-dependent manner ... decreases glucagon secretion from the pancreas by engagement of a specific G protein-coupled receptor ... inhibits acid secretion and gastric emptying in the stomach ...
Acrochordonichthys - Ecology
... Acrochordonichthys is unusually large, and produces a milky-white mucus-like secretion when the fish is severely disturbed ... The exact function of this secretion is unknown, but it has ichthyocidal properties ... This secretion may therefore be defensive in nature ...
Autotransporter Domain
... through the outer membrane of Gram-negative bacteria is termed secretion ... Secretion occurs via a number of different pathways in this type of bacterium ... One of these pathways, known as the type V(a) secretion pathway is exemplified by the prototypical IgA1 Protease of Neisseria gonorrhoeae ...