Paramecium Cells

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[[Eukaryotic cells|''Paramecium'' cells]] are unicellular organisms. They are part of the [[Eukaryotes|eukaryotic]] family. Thus they have membrane-bound [[Organelles|organelles]].  
 
[[Eukaryotic cells|''Paramecium'' cells]] are unicellular organisms. They are part of the [[Eukaryotes|eukaryotic]] family. Thus they have membrane-bound [[Organelles|organelles]].  
  
They can also be categorised as Ciliates, since they are surrounded by numerous [[Cilia|cilia]]; these assist the cytostome for the nutrition process of&nbsp;''paramecium ''and also the movement of the cell. They also have anal pores for excretion processes and [[Contractile vacuole|contractile vacuoles]] whose function prevents bursting of the cell, which would otherwise be caused by the [[Osmosis|osmotic]] uptake of water, by a process known as [[Osmoregulation|osmoregulation]]&nbsp;<ref name="(Beale G. & Preer J,2008).">Beale, Goffey and Preer, John R. Jr. (2008) Paramecium Genetics and Epigenetics CRC Press, Taylor and Francis Group.</ref>. The Paramecium cell reproduces by a process called&nbsp;[[Reproduction by Conjugation|conjugation]].<ref>L.Prescott, J.Hardley and D.Klein Microbiology 6th Edition New York:McGraw-Hill</ref>  
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Paramecium is free living &nbsp;ciliated [[Protozoa|Protozoa]], its&nbsp;cell body is surrounded by&nbsp;[[Cilia|cilia]]; . The function of the cilia is to allow paramecium to move around in its freshwater habitat, they are also used to waft small bacteria and algaes into the gullet (a large invagination in the cell membrane) where they are endocytosed and assymilated into the cell. All waste excess is exctreted via the anal pore. Paramecium lives in a freshwater environment which in the abscence of&nbsp;[[Contractile vacuole|contractile vacuoles]]&nbsp;would burst this is&nbsp;caused by the [[Osmosis|osmotic]] uptake of water, by a process known as [[Osmoregulation|osmoregulation]]&nbsp;<ref name="(Beale G. & Preer J,2008).">Beale, Goffey and Preer, John R. Jr. (2008) Paramecium Genetics and Epigenetics CRC Press, Taylor and Francis Group.</ref>. The Paramecium cell reproduces by a process called&nbsp;[[Reproduction by Conjugation|conjugation]].<ref>L.Prescott, J.Hardley and D.Klein Microbiology 6th Edition New York:McGraw-Hill</ref>&nbsp;and[[asexual fission|asexual fission]]&nbsp;asexual fission creates two genetically identical daughter cells. Paramecium has action potentials not unlike those that occur in [[Neuron|neurons&nbsp;]]&nbsp;calcium ions enter the cell through voltage gated channels and cause the rapid depolarisation of the cell and generate an action potential. The repolarising phase is due to the closing of the calcium ion channels and the opening of the potassium ion channels&nbsp;The length of a typical [[Cell|''paramecium'']] varies from 100 μm to 300 μm&nbsp;<ref>Brock Biology of Micro-organisms 12th Edition, Madigan Dunlap Clark, Pg 69</ref>. They can be found in freshwater areas, like ponds and lakes.<br>  
 
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''Paramecium'' cells are very large. The length of a typical [[Cell|''paramecium'']] varies from 100 μm to 300 μm&nbsp;<ref>Brock Biology of Micro-organisms 12th Edition, Madigan Dunlap Clark, Pg 69</ref>. They can be found in freshwater areas, like ponds and lakes.<br>  
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=== References:  ===
 
=== References:  ===
  
 
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Revision as of 00:31, 27 November 2012

Paramecium cells are unicellular organisms. They are part of the eukaryotic family. Thus they have membrane-bound organelles.

Paramecium is free living  ciliated Protozoa, its cell body is surrounded by cilia; . The function of the cilia is to allow paramecium to move around in its freshwater habitat, they are also used to waft small bacteria and algaes into the gullet (a large invagination in the cell membrane) where they are endocytosed and assymilated into the cell. All waste excess is exctreted via the anal pore. Paramecium lives in a freshwater environment which in the abscence of contractile vacuoles would burst this is caused by the osmotic uptake of water, by a process known as osmoregulation [1]. The Paramecium cell reproduces by a process called conjugation.[2] andasexual fission asexual fission creates two genetically identical daughter cells. Paramecium has action potentials not unlike those that occur in neurons  calcium ions enter the cell through voltage gated channels and cause the rapid depolarisation of the cell and generate an action potential. The repolarising phase is due to the closing of the calcium ion channels and the opening of the potassium ion channels The length of a typical paramecium varies from 100 μm to 300 μm [3]. They can be found in freshwater areas, like ponds and lakes.

References:

  1. Beale, Goffey and Preer, John R. Jr. (2008) Paramecium Genetics and Epigenetics CRC Press, Taylor and Francis Group.
  2. L.Prescott, J.Hardley and D.Klein Microbiology 6th Edition New York:McGraw-Hill
  3. Brock Biology of Micro-organisms 12th Edition, Madigan Dunlap Clark, Pg 69
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