UROPODIA??

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kiran
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UROPODIA??

Post by kiran » Fri Jul 08, 2005 1:01 pm

What does uropodia mean in amoeba?
What ithas to do with it?
tell me........

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victor
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Post by victor » Sat Jul 09, 2005 12:18 pm

I think it's the same like pseudopodia which means 'fake legs'. Pseudopodia is actually a cytoplasm that is formed kinda like cillia...
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Is it??

Post by kiran » Sat Jul 16, 2005 10:12 am

victor wrote:I think it's the same like pseudopodia which means 'fake legs'. Pseudopodia is actually a cytoplasm that is formed kinda like cillia...

Victor,
I don't think so. If it were pseudopodia, why it would have been given another such name as uropodia. Does it have sth to do with excretion?
tell me........

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victor
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Post by victor » Sat Jul 16, 2005 11:49 am

Well, I got the idea from 'podia' word. Because it comes from the word 'podos' which means 'leg' and we know that amoeba only have one movement which is pseudopodia..so I conclude that it's the same.
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Post by Dr.Stein » Sat Jul 16, 2005 12:15 pm

uropodia = ura, tail + podos, leg...
Sorry, I have no idea what it means in amoeba, but in crustaceans, it is a kind of leg, 2 pairs in number, locate on their behind just below the telson, like a tail (so that's they have a name), the function is to drive when the individual swim.

Uropods also appear in lymphocytes (T cells), which used to make a cognate interaction or cell-to-cell interaction. They are cytoplasmic processes, similar to pseudopodia but more slim, look like flexible sticks projected from the body cell.

So?
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victor
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Post by victor » Sat Jul 16, 2005 12:59 pm

I think it can be analogized with pseudopods then... :lol:
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Post by Dr.Stein » Sat Jul 16, 2005 2:02 pm

Yeah, I think it is a kind of pseudopodia...
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Post by canalon » Sun Jul 17, 2005 9:22 pm

From http://www.pasteur.fr/recherche/RAR/RAR2001/Bcp-en.html

Cell polarization necessary for motility of E. histolytica is dependent upon the formation at the leading edge of the cell, of an appendage called the pseudopod enriched in actin and its associated proteins. Pseudopods are also formed during early steps of phagocytosis. As amoeba progresses, another appendage called the uropod is formed at the rear edge, it concentrates the cluster of receptors that undergoes capping at the amoebic surface. These appendages allow parasite motility and phagocytosis. We expect to elucidate the signaling pathway triggered by the interactions between the parasite and the external milieu that lead to the cytoskeletal changes necessary for motility as well as for the interaction with human cells and their eventual phagocytosis.

HTH

Patrick

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