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pinocytosis
(redirected from pinocytotic)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
pin·o·cy·to·sis  (pn-s-tss, -s-, pn-)
n.
Introduction of fluids into a cell by invagination of the cell membrane, followed by formation of vesicles within the cells.

[Greek pnein, to drink; see p(i)- in Indo-European roots + cyt(o)- + -osis.]

pino·cy·totic (-ttk) adj.
pino·cy·toti·cal·ly adv.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.pinocytosis - process by which certain cells can engulf and incorporate droplets of fluid
bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity"


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Examination of tumor cells on electron microscopy will reveal (1) desmosomes, (2) arrays of cytoplasmic, uniformly dispersed microfilaments in the presence or absence of dense bodies, and (3) pinocytotic vesicles with basal lamina separating the tumor cells from the stroma.
The exact mechanism behind closure has yet to be elucidated, but it has been proposed that it reflects a combination of exhaustion of pinocytotic capability and enterocyte replacement by a more mature population of gut epithelial cells (Broughton and Lecce, 1970).
However, there may be some subtle differences at the ultrastructural level (eg, meningioma lacks pinocytotic vesicles).
 
 
 
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