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Grell, Karl G.

doi:10.1007/978-3-642-61958-8_13

Protozoology 1973

DOI: 10.1007/978-3-642-61958-8_13

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Karl G. Grell¹

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2022

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“…Cv, Contractile vacuole; fv, food vacuole; manu, macronucleus; minu, micronucleus; pe, peristome; tr, trichocysts; and ve, vestibulus. (D) Higher magnification of the metachronal waves of the cilia modified from Grell (1973). (Scale bar in A and B = 100 µm, in D = 10 µm).…”

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confidence: 99%

Ion channels of cilia: Paramecium as a model

Valentine

Houten

2022

J Eukaryotic Microbiology

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THINK back to your school days when you looked through a low power microscope at the little animals swimming in a drop of pond water. The prominent ones that zipped around and executed fast turns would likely be paramecia, large single-cell organisms. Their behavior mesmerized early microscopists of the 17th and 18th centuries, too (Leeuwenhoek, 1677). John Hill wrote about them in 1727 remarking on their ability to move swiftly, twist, and turn about its axis and even fold up (Hill, 1727).It is the remarkable motility of the ciliates like Paramecium that caught the attention of the early observers and continues to fascinate us now. These cells can alter swimming speed and direction, but at first what propelled them was a puzzle. By the turn of the 20th century, it was known that these cells can respond to many kinds of stimuli (temperature, chemicals, touch, gravity, and electric field; Jennings, 1906) by changing how they swim and that swimming was powered by the movement of cilia on the cell surface. These cells are covered with 3000 or more cilia depending on the species. Each cilium is a slender whip-like organelle that projects from the surface and beats to propel the cell through its watery home. This review will focus primarily on the holotrichous ciliate Paramecium that is covered in cilia (Figure 1A;Hausmann & Allen, 2010) and the role of ciliary ion channels in the control of its motility. Cilia provide the sensory transduction and also motor output when the cell interacts with its environment.

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confidence: 99%

Ion channels of cilia: Paramecium as a model

Valentine

Houten

2022

J Eukaryotic Microbiology

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Publications

Cited by 1 publication

References 1,047 publications

Ion channels of cilia: Paramecium as a model

Ion channels of cilia: Paramecium as a model

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