Title: Skeletal Muscles | Summary, Innervation, Contract & Facts
Headings: Skeletal Muscles
Skeletal Muscles
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Skeletal Muscles
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Introduction
Quick Navigation
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: It is also sometimes called myolemma. It is known to be made up of two layers; An inner layer called true plasma membrane
An outer layer of polysaccharides called glycocalyx
The true plasma membrane is a lipid bilayer and serves the same function in skeletal muscle fibers as in the other cells of the body. It separates the intracellular and extracellular fluids acting as a selectively permeable barrier between the two media. It contains several ion channels that help in the contraction of the skeletal muscles. 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.