Effect of temperature on mechanical and myothermic properties of rabbit smooth muscle

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dc.contributor.author Gibbs, CL en
dc.contributor.author Loiselle, Denis en
dc.date.accessioned 2011-09-06T20:43:27Z en
dc.date.issued 1980 en
dc.identifier.citation Am J Physiol 238(1):C49-55 1980 en
dc.identifier.issn 0363-6143 en
dc.identifier.uri http://hdl.handle.net/2292/7802 en
dc.description.abstract The mechanical performance and the heat production of 18 rabbit rectococcygeus muscles have been measured at 19 degrees C and 29 degrees C. The rate of energy liberation in a tetanus was 2.96 +/- 0.14 mW/g at 19 degrees C and 5.84 +/- 0.25 mW/g at 29 degrees C. At both temperatures there was a linear relationship between total (initial + recovery) heat production and the stress-time integral for stimulus durations up to 13 s. The slope of the relationship had a Q10 of 1.8. Recovery heat evolution, measured after mechanical relaxation was complete, was approximately exponential in character. The final time constant for recovery heat liberation was 63.1 +/- 5.5 s at 19 degrees C and 32.3 +/- 2.4 s at 29 degrees C. After-loaded isotonic force-velocity data were fitted with the hyperbolic version of Hill's characteristic equation (A. V. Hill. Trails and Trials in Physiology. London: Arnold, 1965). The a/Po ratio was practically temperature independent, but maximal shortening velocity and the constant b had Q10's of 2.5 and 2.7, respectively. en
dc.relation.ispartofseries Am J Physiol en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0363-6143/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Effect of temperature on mechanical and myothermic properties of rabbit smooth muscle en
dc.type Journal Article en
pubs.issue 1 en
pubs.begin-page C49 en
pubs.volume 238 en
dc.rights.holder Copyright: 1980 the American Physiological Society en
dc.identifier.pmid 7356010 en
pubs.author-url http://ajpcell.physiology.org/content/238/1/C49.full.pdf en
pubs.end-page 55 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 63293 en
pubs.org-id Bioengineering Institute en
pubs.org-id ABI Associates en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 7356010 en


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