| Value |
10000
beating cilia/cell
|
| Organism |
Ciliate Paramecium caudatum |
| Reference |
Katsu-Kimura Y, Nakaya F, Baba SA, Mogami Y. Substantial energy expenditure for locomotion in ciliates verified by means of simultaneous measurement of oxygen consumption rate and swimming speed. J Exp Biol. 2009 Jun212(Pt 12):1819-24. doi: 10.1242/jeb.028894. p.1822 right column 2nd paragraphPubMed ID19482999
|
| Primary Source |
Gueron, S. and Levit-Gurevich, K. (1999). Energetic considerations of ciliary beating and the advantage of metachronal coordination. Proc. Natl. Acad. Sci. USA 96, 12240-12245.PubMed ID10535905
|
| Comments |
"Paramecium gains propulsive thrust from beating cilia, by which
metabolic energy is converted to the mechanical work. Gueron and
Levit-Gurevich computed the mechanical thrust of Paramecium cilia
beating in metachronal coordination with neighboring cilia (primary source). If we take 2X10^–16 J to be the mechanical
work per cilium per beat [cf. fig. 2 in (primary source)], the total power of beating cilia
on the entire surface of a single cell (10^4 cilia beating at 40 Hz) can
be estimated to be 2.9X10^–7J/hour. This means that the conversion
of the mechanical power of ciliary beating to propulsive power (StP)
may be far less efficient (0.77%) than that of the conversion of the
Ps [swimming power] to the mechanical power of ciliary beating (10.1%). Remarkably
low efficiency of energy expenditure is one of the characteristics
of Paramecium swimming in the mechanical environment governed
by a viscous drag, where large dissipation of the kinetic energy is
inevitable in the interaction with surrounding water." See Martinac et al., 2008 PMID 18923187 p.1451 right column bottom paragraph:"A single Paramecium cell is covered by approx. 5,000 cilia and cell membrane is covered by a thick extracellular matrix consisting mainly of the "immobilization antigen" protein (ref 228)." See BNID 112283 |
| Entered by |
Uri M |
| ID |
110791 |