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Related Concept Videos

Skeletal Muscle Anatomy00:55

Skeletal Muscle Anatomy

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Skeletal muscle is the most abundant type of muscle in the body. Tendons are the connective tissue that attaches skeletal muscle to bones. Skeletal muscles pull on tendons, which in turn pull on bones to carry out voluntary movements.
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Overview of Skeletal Muscle01:15

Overview of Skeletal Muscle

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Skeletal muscles are composed of a bundle of muscle fibers and are attached to bones through tendons. Each skeletal muscle fiber is a single muscle cell. The sarcolemma, the plasma membrane of a skeletal muscle cell, consists of a lipid bilayer and glycocalyx that supports muscle fibers. The sarcolemma extends into the muscle cells to form tubular structures called transverse or T-tubules. Each side of the T-tubules consists of a membrane-bound structure called the sarcoplasmic reticulum,...
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Formation of Muscle Fibers from Myoblasts01:13

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De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
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The Functions of the Skeletal System01:22

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The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...
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The Muscular System01:18

The Muscular System

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The muscular system is essential to the body's overall structure and function, playing a crucial role in movement, stability, and internal processes. It consists of three distinct types of muscle tissue: the skeletal, the smooth, and the cardiac muscles.
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Microscopic Anatomy of Skeletal Muscles01:13

Microscopic Anatomy of Skeletal Muscles

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Skeletal muscle cells, also called muscle fibers, are distinctly elongated, multi-nucleated, slender biological units. They are packed with specialized structures designed to facilitate their primary function, which is contraction.
The muscle sarcolemma is a plasma membrane enclosing each muscle cell that conducts electrical signals called action potentials. The sarcolemma extends into the cell to form T-tubules, ensuring the neural impulses are uniformly distributed across the entire muscle...
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Related Experiment Video

Updated: May 2, 2026

Author Spotlight: Isolation of Long Muscle Fibers from Mouse Hindlimb Muscles for Studying Excitation-Contraction Coupling Across Fiber Types
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Author Spotlight: Isolation of Long Muscle Fibers from Mouse Hindlimb Muscles for Studying Excitation-Contraction Coupling Across Fiber Types

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[Skeletal muscle: from development to function].

R Imbesi1, V D'Agata1, G Musumeci1

  • 1Dipartimento Scienze Bio-mediche, Università di Catania, Italia.

La Clinica Terapeutica
|March 5, 2014
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Summary

This review explores muscle development and metabolism in mammals, highlighting key factors like growth factors, hormones, and nutrients. Understanding these elements is crucial for muscle growth, differentiation, and overall function.

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Area of Science:

  • Muscle biology
  • Cellular metabolism
  • Mammalian physiology

Background:

  • Myogenesis, differentiation, and muscle metabolism are complex processes.
  • Mesodermal stem cells and regulatory genes play critical roles in early development.
  • Numerous growth factors and substances are vital for muscle function.

Purpose of the Study:

  • To review current knowledge on mammalian myogenesis, differentiation, and muscle metabolism.
  • To highlight the roles of specific growth factors, hormones, and nutrients.
  • To integrate experimental findings with existing literature.

Main Methods:

  • Literature review and synthesis of experimental data.
  • Focus on mesodermal stem cells and regulatory gene functions.
  • Analysis of the impact of growth factors, hormones, and nutrients.

Main Results:

  • Growth factors (myogenin, bFGF) and signaling molecules (IGF-I/II, IL-15, Tf, CA) are essential.
  • Serotonin (5-HT) and L-tryptophan (L-Tp) are important for skeletal muscle metabolism.
  • Dietary L-tryptophan influences protein synthesis and mitochondrial biogenesis in rats.
  • Hormones (GH, T3, T4, sex steroids) significantly impact muscle growth and differentiation.

Conclusions:

  • Muscle development and function are regulated by a complex interplay of intrinsic and extrinsic factors.
  • Specific nutrients and hormones are critical for optimizing muscle growth, metabolism, and differentiation.
  • Further research into these regulatory mechanisms can inform strategies for muscle health.