青蛙肌肉放松的能量学
Energetics of relaxation in frog muscle.
作者信息
Curtin N A, Woledge R C
出版信息
J Physiol. 1974 Apr;238(2):437-46. doi: 10.1113/jphysiol.1974.sp010535.
Abstract
- Changes in the levels of phosphocreatine (PCr) and ATP during relaxation after tetanic contraction have been observed and compared with the heat + work production during the same period.2. The results were the same using 2 sec or 15 sec tetani and using 15 or 30 Hz stimulation.3. During relaxation the mean chemical change (of ATP + PCr) was -0.105 +/- 0.078 mumol/g muscle (n = 53). This change is less than would be required to explain the heat + work produced.4. The PCr split during both 2 sec and 15 sec tetani (up to the last stimulus) was less than would be required to explain the heat + work produced. This confirms previous experiments.5. It is concluded that the discrepancy between chemical change and heat + work production does not diminish during relaxation but actually increases.
摘要
观察了强直收缩后松弛过程中磷酸肌酸（PCr）和三磷酸腺苷（ATP）水平的变化，并与同一时期的热生成和功生成进行了比较。
使用2秒或15秒的强直刺激以及15或30赫兹的刺激，结果相同。
在松弛过程中，ATP + PCr的平均化学变化为-0.105±0.078微摩尔/克肌肉（n = 53）。 这种变化小于解释热生成和功生成所需的变化。
在2秒和15秒的强直刺激期间（直至最后一次刺激），PCr的分解小于解释热生成和功生成所需的分解。 这证实了先前的实验。
得出的结论是，化学变化与热生成和功生成之间的差异在松弛过程中不会减小，反而实际上会增加。
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