Title: Skeletal Muscles | Summary, Innervation, Contract & Facts
Headings: Skeletal Muscles
Skeletal Muscles
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Skeletal Muscles
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Introduction
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Organization
Skeletal Muscle Fiber
Sarcolemma
T-tubules
Myofibrils
Thin filaments
Thick filaments
Z-Disk
Sarcomere
Titin filaments
Sarcoplasm
Sarcoplasmic Reticulum
Innervation
Motor End Plate
Process of Innervation
Excitation-Contraction Coupling
Contraction and Relaxation
ATPase activity of Myosin Head
Role of Troponin in Contraction
Phases of Contraction
Relaxation
Energy Sources
Phosphocreatine
Glycolysis
Oxidative Metabolism
Summary
References

Content: They lie suspended in this fluid. Sarcoplasm is rich in potassium, magnesium and phosphate ions. A large amount of enzymes is also present in it. Mitochondria also lie among the myofibrils in sarcoplasm. They are arranged parallel to the myofibrils and serve to supply energy in the form of ATP so that contraction can occur. Sarcoplasmic Reticulum
It is the specialized endoplasmic reticulum present in the skeletal muscle fibers. it appears as a network of tubules that is present among the myofibrils in the sarcoplasm. They have dilated terminal sacs called the terminal cisternae. In between the two terminal cisternae lies the invagination of the sarcolemma, the t-tubule. The two-terminal cisternae along with at-tubule in between them form a structure called triad.