Abstract
In the experiments on rats a significant decrease of resistance to the contracture and arrhythmogenic effect of increased Ca2+ on the isolated hearts of animals after short term immobilization stress has been shown. After a long term stress (6 hours) the changes of the studied physiological parameters of the isolated hearts were not observed. Transport in the homogenates of the rat hearts was measured by the Ca--selective electrode on the ionometer ORION EA 940. After a 1-hour stress the rate of Ca--transport in sarcoplasmic reticulum (SR) substantially decreased as compared with the control (3.5 fold at 20 mcM), but at the higher concentration the Ca-transport was inhibited. The long term stress lead to a slower damage of functional Ca-transport system of SR--at 20 mcM the rate decreased by 25% as compared with control and at the higher concentration of Ca2+ depression of transport was not observed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
