Related Experiment Videos
Intramuscular pH and energy changes in muscle.
Advances in Experimental Medicine and Biology
|January 1, 1984
Summary
Frog sartorius muscle intracellular pH (pHi) is more acidic than extracellular pH. Muscle buffering power was measured using pH-sensitive microelectrodes, providing key insights into cellular acid-base balance.
Area of Science:
- Physiology
- Cell Biology
- Biochemistry
Background:
- Intracellular pH (pHi) is a critical determinant of cellular function.
- Understanding the buffering capacity of muscle tissue is essential for comprehending its physiological response to metabolic challenges.
Purpose of the Study:
- To measure the intracellular pH (pHi) of unstimulated frog sartorius muscle.
- To determine the buffering power of frog sartorius muscle fibers.
Main Methods:
- Utilized pH-sensitive microelectrodes for precise intracellular and extracellular pH measurements.
- Analyzed 19 sartorius muscle fibers to assess pHi and buffering capacity.
Main Results:
- The mean intracellular pH (pHi) of frog sartorius muscle was found to be approximately 0.3 units more acidic than the extracellular pH.
- The measured buffering power was 44.0 +/- 7.1 mM/pH unit for fibers with a pHi of 6.83 +/- 0.05.
Conclusions:
- Frog sartorius muscle exhibits an acidic intracellular pH relative to its extracellular environment.
- The study quantifies the buffering power of frog sartorius muscle, contributing to the understanding of muscle acid-base regulation.