phagocytosis

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ntpt
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phagocytosis

Post by ntpt » Sun Feb 19, 2006 2:56 am

"A particle that has been taken into a cell by phagocytosis is not truly inside the cell." Can someone plz explan this statement??

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victor
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Post by victor » Sun Feb 19, 2006 7:06 am

what it means by 'inside the cell' is get surrounded by cytoplasm...phagosome is not inside the cytoplasm, because it's surrounded by vesicle..
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Post by cool A-level student » Thu Feb 23, 2006 11:52 am

mmm is that not similar to exocytosis?

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Post by MrMistery » Thu Feb 23, 2006 6:17 pm

Well, if you consider phagocytosis as a form of endocytosis as some authors do, then you can regard as phagocytosis as the reverse of exocytosis. Remember that there a lot of differences in the mechanisms of phagocytosis and endocytosis though...
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Post by tommiekiddy » Sat Feb 25, 2006 3:22 pm

Ingestion and digestion of bacteria and particles by phagocytes.The process by which particulate material is engulfed by a cell. Prominent in predatory protozoa, such as Amoeba proteus, and in certain specialized cells of multicellular animals such as macrophages. (From Greek, phagein, to eat.)
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Post by Dr.Stein » Mon Feb 27, 2006 8:29 am

victor wrote:what it means by 'inside the cell' is get surrounded by cytoplasm...phagosome is not inside the cytoplasm, because it's surrounded by vesicle..

Hmm, as far as I know, phagosome is an endosome or vacuole or vesicle where a bacterium trapped after engulfed by a phagocyte via phagocytosis. It will be digested intracellularly by lysosome that fuses to that vesicle and spill the lysozym there :?
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Post by MrMistery » Mon Feb 27, 2006 6:21 pm

i think what he meants was it is surrounded by a membrane...
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Post by teroperkele » Mon Feb 27, 2006 9:21 pm

Well, almost all membranes are similar in somekind of fashion, but when cell takes particle inside , the membrane curves inside and thus with help of different proteins(usually chlatrin) , folds up and forms a vesicle which buds inside with help of dynamin-protein. Therefore vesicle is made of the cell membrane, and whats inside comes from ECM. cool it maan! :)

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Post by Dr.Stein » Tue Feb 28, 2006 4:54 am

Yeah, clathrin... from Golgi's activity :)
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Post by tommiekiddy » Tue Feb 28, 2006 6:11 am

:D myes y=u are right
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