Study objectives

• Discuss the functions of skeletal muscle

• Distinguish between isometric and isotonic contractions

• Describe the components of the thick filaments and thin filaments

• Explain the functions of the following: myosin crossbridges, troponin, tropomyosin, sarcomeres, Z lines, neuromuscular junction, transverse tubules, and sarcoplasmic reticulum

• Describe the sliding filament theory of skeletal muscle contraction

• Explain how creatine phosphate, oxidative phosphorylation, and gly-colysis provide energy for skeletal muscle contraction

• List the factors that influence the onset of muscle fatigue

• Describe the factors that lead to development of muscle fatigue

• Describe the metabolic processes that lead to oxygen debt

• Distinguish among the three types of muscle fibers: slow-twitch ox-idative, fast-twitch oxidative, and fast-twitch glycolytic

• Describe the factors that influence the strength of skeletal muscle contraction including: multiple motor unit summation, asynchronous motor unit summation, frequency of nerve stimulation, length-tension relationship, and diameter of the muscle fiber

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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