scholarly journals THE MODE OF THE CHANGE IN INTERNAL POTASSIUM OF THE FROG SARTORIUS MUSCLE PRODUCED BY THE CHANGE IN EXTERNAL POTASSIUM OR CALCIUM ION CONCENTRATION

1967 ◽  
Vol 14 (3) ◽  
pp. 101-111
Author(s):  
K. NODA ◽  
S. TERASAKI
Keyword(s):  
Calcium Ion ◽  
Ion Concentration ◽  
Sartorius Muscle ◽  
Frog Sartorius Muscle ◽  
External Potassium ◽  
Calcium Ion Concentration ◽  
Frog Sartorius

Association of increased pHi with calcium ion release in skeletal muscle

1978 ◽  
Vol 234 (3) ◽  
pp. C110-C114 ◽  
Author(s):  
R. J. Connett
Keyword(s):  
Skeletal Muscle ◽  
Calcium Ion ◽  
Calcium Release ◽  
Muscle Membrane ◽  
Sartorius Muscle ◽  
Ion Release ◽  
Extracellular Medium ◽  
Dantrolene Sodium ◽  
External Potassium ◽  
Frog Sartorius

The pH difference across the cell membrane of frog sartorius muscle cells was measured with the distribution of 5,5-dimethyl-2,4-oxazolidine-dione (DMO) as the marker. Depolarization of the muscles to values at or below the contraction threshold caused by elevating external potassium up to approximately 20 mM resulted in an internal alkalinization. The change was smaller with superthreshold depolarization (20--30 mM [K+]). The alkalinization was blocked by agents that block calcium release from the sarcoplasmic reticulum (procaine and dantrolene sodium). Other agents that cause calcium release (caffeine, theophylline, and quinine) were found to give alkalinization when tested at concentrations just below the contracture threshold. Increased acidification of the extracellular medium was associated with the internal alkalinization. The data were interpreted as indicating the presence of a calcium-stimulated H+ and/or OH- ion transport system in the muscle membrane.

Model of short-term regulation of calcium-ion concentration

SIMULATION ◽  
1979 ◽  
Vol 32 (6) ◽  
pp. 193-204 ◽  
Author(s):  
George G. Járos ◽  
Thomas G. Coleman ◽  
Arthur C. Guyton
Keyword(s):  
Calcium Ion ◽  
Ion Concentration ◽  
Short Term ◽  
Calcium Ion Concentration

Bile canalicular contraction in the isolated hepatocyte doublet is related to an increase in cytosolic free calcium ion concentration

2008 ◽  
Vol 8 (3) ◽  
pp. 178-183 ◽  
Author(s):  
Sumio Watanabe ◽  
Masahiro Tomono ◽  
Makoto Takeuchi ◽  
Tsuneo Kitamura ◽  
Miyoko Hirose ◽  
...  
Keyword(s):  
Calcium Ion ◽  
Ion Concentration ◽  
Free Calcium ◽  
Cytosolic Free Calcium ◽  
Bile Canalicular Contraction ◽  
Calcium Ion Concentration
Sign in / Sign up

Export Citation Format

Share Document