Skeletal muscle: a brief review of structure and function

Area of Science:

• Human physiology
• Muscle biology

Background:

• Skeletal muscle constitutes ~40% of body weight and 50-75% of body proteins.
• Muscle mass regulation involves a balance between protein synthesis and degradation.
• Factors influencing muscle mass include nutrition, hormones, exercise, and disease.

Purpose of the Study:

• To review the structure and function of human skeletal muscle.
• To emphasize recent scientific literature on single muscle fibers.
• To cover key aspects like cytoskeletal architecture, excitation-contraction coupling, energy metabolism, and force generation.

Main Methods:

• Literature review focusing on human skeletal muscle.
• Emphasis on recent scientific publications.
• Analysis of single muscle fiber properties.

Main Results:

• Skeletal muscle is highly dynamic and plastic.
• Protein synthesis and degradation balance is crucial for muscle mass.
• Multiple factors interact to regulate muscle homeostasis.

Conclusions:

• Understanding human skeletal muscle requires examining its complex structure and function.
• Single muscle fiber research provides critical insights into muscle physiology.
• Further research on muscle plasticity and regulation is essential.