endocytosis

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endocytosis

 [en″do-si-to´sis]
the uptake by a cell of material from the environment by invagination of the plasma membrane; it includes both phagocytosis and pinocytosis.
Endocytosis. Shown are pinocytosis of small fluid droplets (left) and phagocytosis of a large particle (right). From Dorland's, 2000.

en·do·cy·to·sis

(en'dō-sī-tō'sis),
Internalization of substances from the extracellular environment through the formation of vesicles formed from the plasma membrane. There are two forms: (a) fluid phase (pinocytosis), and (b) receptor mediated.
See also: phagocytosis. Compare: exocytosis (2).
[endo- + G. kytos, cell, + -osis, condition]

endocytosis

/en·do·cy·to·sis/ (-si-to´sis) the uptake by a cell of material from the environment by invagination of its plasma membrane; it includes both phagocytosis and pinocytosis.

endocytosis

(ĕn′dō-sī-tō′sĭs)
n.
A process of cellular ingestion by which the plasma membrane folds inward to bring substances into the cell.

en′do·cyt′ic (-sĭt′ĭk), en′do·cy·tot′ic (-sī-tŏt′ĭk) adj.
en′do·cy·tose′ (-tōs′) v.

endocytosis

[en′dōsītō′sis]
Etymology: Gk, endon, within, + kytos, cell
uptake by a cell of material from the environment by invagination of its plasma membrane, which may be either phagocytosis or pinocytosis. Compare exocytosis.
enlarge picture
Endocytosis

en·do·cy·to·sis

(en'dō-sī-tō'sis)
Internalization of substances from the extracellular environment through the formation of vesicles formed from the plasma membrane.
See also: phagocytosis
Compare: exocytosis (2)
[endo- + G. kytos, cell, + -osis, condition]

endocytosis

A method by which a large molecule, such as a protein, can enter a cell. The plasma membrane of the cell is invaginated by the molecule so that an internal vesicle is formed containing the molecule. This then breaks off from the surface membrane and moves into the interior of the cell. Such vesicles are coated with a protein called clathrin.

endocytosis

an active process by which some cells can enclose a smaller body (e.g. a food particle) forming a membrane-bound vesicle. Compare EXOCYTOSIS. See PHAGOCYTOSIS, PINOCYTOSIS.

endocytosis

the uptake by a cell of material from the environment by invagination of the plasma membrane; it includes both phagocytosis and pinocytosis.

receptor mediated endocytosis
uptake of materials bound to specific cell-surface receptors by invagination of the plasma membrane to form a small membrane-bounded vesicle; a mechanism for entry of viruses into cells.
References in periodicals archive ?
TOR appears to be the progenitor of a new class of endocytotic accessory proteins.
This endocytotic mechanism is to be used for active targeting of liposomes to MOLT4 cells within this project.
Vitellogenesis occurred through a process of autosynthesis, involving the combined activity of the Golgi complex, mitochondria and rough endoplasmic reticulum, and a process of heterosynthesis, in which extraovarian precursors were incorporated into oocytes by endocytotic activity at the basal region of the oolemma of the early vitellogenic oocytes.
An improved understanding of cholesterol and sugar homeostasis has tremendous potential for improving general public health, and furthermore this proposal will help to uncover general principles of endocytotic uptake and facilitated diffusion systems at the molecular level.
Endocytotic figures may be seen between the vitellogenic oocyte and the auxiliary cell, indicating a transfer of nutrients.
These data indicate that TOR is the progenitor of a new class of endocytotic accessory proteins.
Kostner and colleagues have recently identified the mammalian hepatic asialoglycoprotein receptor, an endocytotic recycling receptor that mediates the binding and internalization of desialylated glycoproteins as a selective receptor and may be responsible for Lp(a) catabolism in vivo (G.