Abstract
1. 1. The changes in intracellular sodium ion concentration ( C i Na ) of sheep cardiac Purkinje fibres in hyperosmotic solutions were studied using Na-sensitive liquid ion-exchanger microelectrodes. 2. 2. C i Na was increased in hyperosmotic solutions containing different concentrations of sucrose from 0 to 300 mM. 3. 3. The changes in resting membrane potential (RMP) in hyperosmotic solutions had no regularity. In most of the experiments there was hyperpolarization of the membrane but in a few cases a depolarization or no change of RMP were also observed. 4. 4. The N-shape of I- V relations of the fibres became more pronounced in hyperosomotic solutions.
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 callMore From: Comparative Biochemistry and Physiology -- Part A: Physiology
Disclaimer: 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.
