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July 1, 1976The Journal of General PhysiologyOpen Access

A temporal dissociation of energy liberation and high energy phosphate splitting during shortening in frog skeletal muscles.

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Population

Rana pipiens skeletal muscles

Comparison

Rapid shortening vs Isometric contraction

Design

Preclinical

Authors

JRJack A. RallThe Ohio State UniversityEHEarl HomsherHeart Failure / CardiomyopathyAWA WallnerUniversity of California, Los Angeles

Discussion

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Implication

Suggests delayed phosphate splitting with rapid shortening in skeletal muscle; leaves open relevance to mammalian or cardiac energetics.

Structured PICO

P
Population
Rana pipiens skeletal muscles
I
Intervention
Rapid shortening (isotonic contraction against small loads)
C
Comparator
Isometric contraction
O
Outcome
Ratio of explained heat + work (calculated from high energy phosphate splitting) to observed heat + worksurrogate

Rapid shortening at the beginning of contraction induces a delay between energy production and measurable high energy phosphate splitting in frog skeletal muscle.

Cite This Study

Rall et al. (1976) studied this question.

synapsesocial.com/papers/6a2084f4cd682a52c6f8a048https://doi.org/10.1085/jgp.68.1.13
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Activation heat, activation metabolism and tension‐related heat in frog semitendinosus muscles1972 · 186 citations
  2. 2The thermal effects of shortening in tetanic contractions of frog muscle1973 · 16 citations
  3. 3The relation between heat produced and phosphorylcreatine split during isometric contraction of frog's muscle1967 · 44 citations
  4. 4The breakdown of adenosine triphosphate in the contraction cycle of the frog sartorius muscle1967 · 41 citations
  5. 5Free energy and enthalpy of ATP hydrolysis in the sarcoplasm1969 · 145 citations