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Keywords: contraction
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Journal Articles
J Exp Biol (2016) 219 (2): 168–174.
Published: 01 January 2016
... mutations in these isoforms illustrate how myosin is adapted for specific functions. Muscle Contraction Human Cardiac Skeletal Myosins are a large family of ATP-driven mechanoenzymes that generate a wide range of mechanical activities using the actin cytoskeleton as a track to move along...
Journal Articles
J Exp Biol (2015) 218 (3): 370–380.
Published: 01 February 2015
... physiological changes during metamorphosis. This study presents a comprehensive structural and functional analysis of the larval and adult dorsal vessel in the malaria mosquito Anopheles gambiae . Using intravital video imaging we show that, unlike the adult heart, the larval heart contracts exclusively in the...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (15): 2974–2982.
Published: 01 August 2013
... energetics muscle mechanics rabbit contraction The cheetah [ Acinonyx jubatus (Schreber 1775)] is the fastest running animal with a top speed of 29 m s −1 ( Sharp, 1997 ), considerably faster than racehorses ( Spence et al., 2012 ) and racing greyhounds ( Usherwood and Wilson, 2005 ), which can...
Journal Articles
J Exp Biol (2012) 215 (12): 2088–2095.
Published: 15 June 2012
... indicate that, despite the unusual M at position 8, it still retains myoinhibitory activity, inhibiting the frequency and reducing the amplitude of contractions in the anterior midgut and hindgut, and decreasing heart rate. * Author for correspondence ( dohee.lee@utoronto.ca ) 31 10 2011 21...
Journal Articles
J Exp Biol (2012) 215 (2): 239–246.
Published: 15 January 2012
...Justin F. Shaffer; William M. Kier SUMMARY The speed of muscle contraction is largely controlled at the sarcomere level by the ATPase activity of the motor protein myosin. Differences in amino acid sequence in catalytically important regions of myosin yield different myosin isoforms with varying...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (10): 1692–1698.
Published: 15 May 2011
...Michael Nickel; Corina Scheer; Jörg U. Hammel; Julia Herzen; Felix Beckmann SUMMARY Sponges constitute one of the two metazoan phyla that are able to contract their bodies despite a complete lack of muscle cells. Two competing hypotheses on the mechanisms behind this have been postulated to date...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2010) 213 (4): 541–550.
Published: 15 February 2010
... aorta. Here, we present qualitative and quantitative data characterizing the heart of the mosquito, Anopheles gambiae . Visual observation showed that the heart of resting mosquitoes contracts at a rate of 1.37 Hz (82 beats per minute) and switches contraction direction, with 72% of contractions...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2007) 210 (16): 2843–2850.
Published: 15 August 2007
... how they are influenced through stretch. We used the anterior tibialis muscle of leopard frogs ( Rana pipiens complex) to measure the oxygen consumed and work done during shortening contractions that were immediately preceded by either a brief stretch (5% muscle length over 25 ms) or an isometric...
Journal Articles
J Exp Biol (2006) 209 (7): 1159–1168.
Published: 01 April 2006
... skeletal muscle resting metabolism contraction One of Bob Boutilier's outstanding contributions to the field of comparative biology is his body of research into amphibian physiology,encompassing areas as diverse as subcellular metabolic regulation to the effects of environmental change on...
Journal Articles
J Exp Biol (2005) 208 (11): 2135–2145.
Published: 01 June 2005
...Colin M. DeMill; Kerry R. Delaney SUMMARY Action potential-mediated calcium (Ca) entry into excitor nerve terminal boutons during presynaptic inhibition and the effects of co-activation of the inhibitor on the kinetics of muscle contraction were studied at crayfish claw opener muscle. Inhibition...
Journal Articles
J Exp Biol (2004) 207 (26): 4515–4524.
Published: 15 December 2004
...Michael Nickel SUMMARY Sponges of the species Tethya wilhelma display rhythmic body contractions, which were analyzed by digital timelapse imaging and semi-automated image analysis. For the first time, differential, quantitative data on sponge behaviour could be obtained. The sponges are able to...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2002) 205 (15): 2161–2166.
Published: 01 August 2002
...Klaus D. Jürgens SUMMARY The skeletal muscles of the smallest mammal, the Etruscan shrew Suncus etruscus , are functionally and structurally adapted to the requirements of an enormously high energy turnover. Isometric twitch contractions of the extensor digitorum longus (EDL) and soleus muscles...
Journal Articles
J Exp Biol (2002) 205 (11): 1585–1595.
Published: 01 June 2002
... contraction power isometric force P 0 force/velocity force series elasticity V 0 V max Scyliorhinus canicula dogfish Dogfish myotomal muscle consists of three fibre types, white, red and superficial. In common with teleost fish, the different types are well segregated in the body...
Journal Articles
J Exp Biol (2001) 204 (15): 2627–2635.
Published: 01 August 2001
... troponin I. *Author for correspondence (e-mail: s.kreissl@uni-konstanz.de ) 14 5 2001 © The Company of Biologists Limited 2001 2001 Idotea emarginata nervous system motoneurone modulation actin myosin troponin I contraction caffeine. The penta-peptide proctolin...
Journal Articles
J Exp Biol (1986) 122 (1): 177–192.
Published: 01 May 1986
... ions and to 4-aminopyridine (4-AP). Action potentials were followed in 10–20 ms by a rapid all-or-none contraction of the axopods and stalk. Contraction was blocked in Ca 2+ -free solution containing EGTA and by Co 2+ , which suggests a requirement of external Ca 2+ for this event. Contraction was also...
Journal Articles
J Exp Biol (1984) 108 (1): 137–149.
Published: 01 January 1984
...IAN D. MCFARLANE 1. Single shocks to the column sometimes evoke tentacle contractions, ranging from slight movement of a few scattered tentacles to rapid bending or shortening of all the tentacles. Some individuals are more responsive than others. Complex bursts of electrical activity follow single...