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Phys Rev Lett. 2016 Dec 16;117(25):258101. doi: 10.1103/PhysRevLett.117.258101. Epub 2016 Dec 14.

Load Response of the Flagellar Beat.

Author information

1
Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany.
2
Experimental Physics, Saarland University, 66041 Saarbr├╝cken, Germany.
3
Physics and Materials Science Research Unit, University of Luxembourg, 1511 Luxembourg, Luxembourg.
4
Center for Advancing Electronics Dresden cfaed, TU Dresden, 01062 Dresden, Germany.

Abstract

Cilia and flagella exhibit regular bending waves that perform mechanical work on the surrounding fluid, to propel cellular swimmers and pump fluids inside organisms. Here, we quantify a force-velocity relationship of the beating flagellum, by exposing flagellated Chlamydomonas cells to controlled microfluidic flows. A simple theory of flagellar limit-cycle oscillations, calibrated by measurements in the absence of flow, reproduces this relationship quantitatively. We derive a link between the energy efficiency of the flagellar beat and its ability to synchronize to oscillatory flows.

PMID:
28036211
DOI:
10.1103/PhysRevLett.117.258101
[Indexed for MEDLINE]

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