scholarly journals MOVEMENTS OF CALCIUM DURING TENSION DEVELOPMENT INDUCED BY BARIUM AND HIGH-POTASSIUM IN GUINEA PIG TAENIA COLI

1969 ◽  
Vol 19 (2) ◽  
pp. 291-299 ◽  
Author(s):  
HIDEAKI KARAKI ◽  
MIYOSHI IKEDA ◽  
NORIMOTO URAKAWA
Keyword(s):  
Guinea Pig ◽  
Taenia Coli ◽  
High Potassium ◽  
Tension Development

scholarly journals Role of glycolysis in the tension development under anoxia in guinea pig taenia coli.

1982 ◽  
Vol 32 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Tetsuyuki NASU ◽  
Kazumi YUI ◽  
Hideyuki NAKAGAWA ◽  
Yukio ISHIDA
Keyword(s):  
Guinea Pig ◽  
Taenia Coli ◽  
Tension Development

scholarly journals ROLE OF GLYCOLYSIS IN THE TENSION DEVELOPMENT UNDER ANOXIA IN GUINEA PIG TAENIA COLI

1982 ◽  
Vol 32 (1) ◽  
pp. 65-71
Author(s):  
Tetsuyuki NASU ◽  
Kazumi YUI ◽  
Hideyuki NAKAGAWA ◽  
Yukio ISHIDA
Keyword(s):  
Guinea Pig ◽  
Taenia Coli ◽  
Tension Development

scholarly journals Caffeine and Excitation-Contraction Coupling in the Guinea Pig Taenia Coli

1971 ◽  
Vol 57 (4) ◽  
pp. 448-463 ◽  
Author(s):  
Y. Ito ◽  
H. Kuriyama
Keyword(s):  
Low Temperature ◽  
Guinea Pig ◽  
Membrane Resistance ◽  
Similar Response ◽  
Taenia Coli ◽  
Free Solution ◽  
Initial Tension ◽  
Tension Development ◽  
Minimum Concentration ◽  
Phasic Contraction

The effects of caffeine (0.2–10 mM) on the electrical and mechanical activities of guinea pig taenia coli were investigated with the double sucrose-gap method. Caffeine evoked a small tension with a latency of 20–30 sec, then phasic contraction developed and finally relaxation. The initial tension development also appeared in the Na-free solution without any marked changes in the membrane potential and membrane resistance. The phasic contraction disappeared in the Na-free solution. The relaxation in the presence of caffeine was accompanied by depolarization block of the spike generation. The minimum concentration of Ca ion needed to evoke the tension development by the caffeine was 10-7 M. Caffeine also potentiated the twitch tension below a concentration of 5 mM either in the Na-free solution or at low temperature (5°C). NO3- and Br- showed a similar response to caffeine on the potentiation of the twitch tension at low temperature.

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