| The effect of temperature on the contractile response of cardiac muscle from two frog species, Rana temporaria and Xenopus laevis, at two different calcium concentrations-II. At pH 7.0 and pH 6.6. | |
| | |
MedLine Citation:
|
PMID: 6128131 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
1. Mechanical parameters were recorded from paced ventricular cardiac muscle strips of two amphibian species. Rana temporaria and xenopus laevis. 2. The strips contracted at pH 6.6 and 7.0 with either 1.6 or 3.0 mM Ca2+ while the temperature was changed from 5 to 30 degree C. 3. In the hearts of R. temporaria, but not in those of X. laevis, in increased Ca2+ concentration at low pH could compensate for the effect of lowered pH. 4. It is concluded that during high CO2 tension and/or low pH the myocardium of X. laevis was more temperature dependent, less Ca2+ dependent in the Ca2+ range examined and less sensitive to the pH and/or the CO2 tension during physiological temperature and Ca2+ concentration, than the cardiac muscle of R. temporaria. |
| | |
Authors:
|
G Lagerstrand |
Publication Detail:
|
Type: In Vitro; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Comparative biochemistry and physiology. A, Comparative physiology Volume: 73 ISSN: 0300-9629 ISO Abbreviation: Comp Biochem Physiol A Comp Physiol Publication Date: 1982 |
Date Detail:
|
Created Date: 1983-01-19 Completed Date: 1983-01-19 Revised Date: 2008-10-30 |
Medline Journal Info:
|
Nlm Unique ID: 1276312 Medline TA: Comp Biochem Physiol A Comp Physiol Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 469-75 Citation Subset: IM |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Calcium / pharmacology* Carbon Dioxide / metabolism Dose-Response Relationship, Drug Hydrogen-Ion Concentration Myocardial Contraction / drug effects* Myocardium / metabolism Rana temporaria / physiology* Temperature* Xenopus laevis / physiology* |
| Chemical | |
Reg. No./Substance:
|
124-38-9/Carbon Dioxide; 7440-70-2/Calcium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The effect of temperature on the contractile response of cardiac muscle from two frog species, Rana ...
Next Document: The participation of shivering and nonshivering thermogenesis in warm and cold-acclimated rats.