exocytosis

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exocytosis

 [ek″so-si-to´sis]
1. the discharge from a cell of particles that are too large to diffuse through the wall; the opposite of endocytosis.
2. the aggregation of migrating leukocytes in the epidermis as part of the inflammatory response.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ex·o·cy·to·sis

(ek'sō-sī-to'sis),
1. The appearance of migrating inflammatory cells in the epidermis.
2. The process whereby secretory granules or droplets are released from a cell; the membrane around the granule fuses with the cell membrane, which ruptures, and the secretion is discharged. Synonym(s): emeiocytosis, emiocytosis Compare: endocytosis.
[exo- + G. kytos, cell, + -osis, condition]
Farlex Partner Medical Dictionary © Farlex 2012

exocytosis

(ĕk′sō-sī-tō′sĭs)
n. pl. exocyto·ses (-sēz′)
A process of cellular secretion or excretion in which substances contained in vesicles are discharged from the cell by fusion of the vesicular membrane with the outer cell membrane.

ex′o·cy·tose′ (-tōs′) v.
ex′o·cy·tot′ic (-tŏt′ĭk) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ex·o·cy·to·sis

(eksō-sī-tōsis)
1. The appearance of migrating inflammatory cells in the epidermis.
2. The process whereby secretory granules or droplets are released from a cell; the membrane around the granule fuses with the cell membrane, which ruptures, and the secretion is discharged.
Synonym(s): emeiocytosis, emiocytosis.
Compare: endocytosis
[exo- + G. kytos, cell, + -osis, condition]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

exocytosis

The movement of peptides or proteins out of a cell into the extracellular fluid, in tiny membranous vesicles that pass through the plasma membrane.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

exocytosis

an active process in which vesicles containing excretory or secretory materials are actively carried to the periphery of the cell, and released to the outside when the vesicle membrane fuses with the cell membrane. Compare ENDOCYTOSIS. See PHAGOCYTOSIS, PINOCYTOSIS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ex·o·cy·to·sis

(eksō-sī-tōsis)
Appearance of migrating inflammatory cells in the epidermis.
[exo- + G. kytos, cell, + -osis, condition]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Moreover, the functional response of mast cells depends on the stimuli received [12]; for example, following classical activation via the IgE receptor, Fc[epsilon]R1, mast cells degranulate rapidly (within minutes) to exocytose prostaglandins and leukotrienes as well as preformed cytokines, tryptase, histamine, heparin, and platelet activating factor (PAF) whilst de novo synthesised cytokines exhibit a more delayed (hours) release [8, 21].
At this stage, there is a multivesicular body that contains vesicles, and at some point the multivesicular body can fuse with the cellular plasma membrane and exocytose the vesicles contained within it.
In the Crustacean, studies carried out on the peneaid shrimp Sycionia ingentis (Pillai & Clark, 1990; Glas et al., 1996) showed that post-spawning changes occurred in oocyte envelopes due to the exocytose of vesicles similar to cortical granules, which reorganized the oocyte envelopes to form a covering (hatching envelope) which contained sugar moieties including mannose, glucose, N-acetyl-glucosamine and sialic acid (Pillai & Clark, 1990).