scholarly journals The dependence of efflux of sodium from frog muscle on internal sodium and external potassium

1965 ◽  
Vol 177 (3) ◽  
pp. 355-376 ◽  
Author(s):  
E. J. Harris
Keyword(s):  
Frog Muscle ◽  
External Potassium

Effect of external potassium concentrations, insulin and lactate on frog muscle potassium and respiratory rate

1960 ◽  
Vol 198 (1) ◽  
pp. 67-77 ◽  
Author(s):  
L. B. Smillie ◽  
J. F. Manery
Keyword(s):  
Respiratory Rate ◽  
Frog Muscle ◽  
K Uptake ◽  
Seasonal Differences ◽  
Ringer’S Solution ◽  
External Potassium ◽  
Additional Stimulation

In Ringer's solution containing 10 mEq K/l., frog muscles consumed oxygen at 20°C at rates ranging from 88 (summer frogs) to 128 (winter frogs) cu mm/gm/hr. These rates, which were three to four times higher than those at 2 and 6 mEq K/l., continued to rise for at least 6 hours, although the muscles had previously been soaked at 5°C in the type of Ringer's in which they respired. Addition of lactate increased the respiratory rate at all K concentrations studied. When insulin was present a marked additional stimulation was observed at 2 and 6 mEq K/l., which was changed to an inhibition at 10 mEq/l. Potassium analyses of all of the environmental fluids and of the muscles (144 of each) demonstrated a slight K loss from control muscles which was reduced or abolished by lactate. Insulin, however, either with or without added lactate, abolished the K loss and induced an appreciable K uptake. This K gain occurred regardless of the effect of insulin on the respiratory rate. Denaturation of the insulin abolished all of its effect. Seasonal differences were noted.

scholarly journals Effect of external potassium concentrations, insulin and lactate on frog muscle potassium and respiratory rate

1960 ◽  
Vol 198 (6) ◽  
pp. 1360-1360
Author(s):  
L. B. Smillie ◽  
J. F. Manery
Keyword(s):  
Oxygen Consumption ◽  
Respiratory Rate ◽  
Frog Muscle ◽  
Metabolic Changes ◽  
Ringer Lactate ◽  
High Potassium ◽  
Insulin Effect ◽  
All Solutions ◽  
External Potassium

L. B. Smillie and J. F. Manery, "Effect of external potassium concentrations, insulin and lactate on frog muscle potassium and respiratory rate." Page 69: Table 1, Section 3, Insulin effect in the presence of lactate (May, June and July), column 3 (Exptl.) should read RIL for all solutions. Page 70: 1st column, 4th paragraph, 2nd sentence should read: A marked depression of the oxygen consumption. ... Page 71: 1st column, 3rd paragraph, 14th line should read: ... Ringer-lactate at the 5th and 6th hours being 136.9 and that in Ringer-insulin-lactate being 81.8 cu mm/gm/hr. Page 72: 1st column, 1st paragraph, 7th line should read: ... lactate when the metabolic changes invoked by high potassium were in operation. Page 73: 1st column, 2nd paragraph, 15th line should read: ... muscle and fluid analyses are presented in column 7. Page 73: 2nd column, 3rd paragraph, 6th line should read: That the depression of the potassium movement is specifically related to insulin and is unrelated to lactate is again implied. ... Page 74: 1st column, 1st paragraph, 8th line should read: ... the amounts of potassium taken from the medium. ... Page 76: 2nd column, 3rd paragraph, 9th line should read: ... that phosphocreatine began to be hydrolyzed. ... Page 77: Reference 1 should read: Manery, J. F., L. B. Smillie and K. E. Toye. J. Cell & Comp. Physiol. 44:336, 1954.

scholarly journals Potentiometric measurement of membrane action potentials in frog muscle fibres

1966 ◽  
Vol 183 (1) ◽  
pp. 152-166 ◽  
Author(s):  
B. Frankenhaeuser ◽  
B. D. Lindley ◽  
R. S. Smith
Keyword(s):  
Action Potentials ◽  
Frog Muscle ◽  
Muscle Fibres ◽  
Membrane Action ◽  
Potentiometric Measurement

scholarly journals Changes in the natural abundance 13C NMR spectra of intact frog muscle upon storage and caffeine contracture.

1982 ◽  
Vol 257 (6) ◽  
pp. 2741-2743
Author(s):  
M Bárány ◽  
D D Doyle ◽  
G Graff ◽  
W M Westler ◽  
J L Markley
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Frog Muscle ◽  
Natural Abundance ◽  
13C Nmr Spectra ◽  
Caffeine Contracture
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