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: The innervation of the skeletal muscle fiber also takes place via sarcolemma. The glycocalyx above the plasma membrane also contains several collagen fibers. It serves to hold the fibers together. At each end of the skeletal muscle fibers, the glycocalyx layers of several fibers merge and fuse with the tendon, attaching the muscle fibers to the bones. T-tubules
At some places along the length of the fiber, the sarcolemma invaginates into the cytoplasm to form transverse tubules called T-tubules. Each T-tubule is connected with smooth endoplasmic reticulum on either side to form a triad. These triads serve a special role in the contraction of skeletal muscles. Myofibrils
Each skeletal muscle fiber is composed of several hundred to several thousand of myofibrils. These myofibrils extend throughout the length of the skeletal muscle fiber. Each myofibril is further composed of two types of filaments, thin filaments and thick filaments.