Myoglobin oxygen binding pigment found in the

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myoglobin (oxygen binding pigment found in the sarcoplasm) and many blood vessels (gives red appearance), use ATP at a slow rate, produce slow, weak but long lasting contractions that are essential for postural muscles of the back b) white fast-twitch fibers: thick fibers that contain little myoglobin and few blood vessels (gives white appearance), split ATP fast but fatigue quickly, produce rapid, powerful but short lasting contractions that are found in the muscles of the upper limbs c) intermediate fast-twitch fibers: intermediate thickness and split ATP at fast rate so they contract quickly with more power than red fibers but contain moderate amounts of myoglobin so they are somewhat fatigue- resistant, predominat in muscles of the lower limb for posture, endurance and acceleration. MODULE REVIEW QUESTIONS A. Describe the four main characteristics of muscle tissue. B. What is a motor unit? C. Describe the microscopic anatomy of a muscle fiber and explain the theory of muscle contraction. D. What are the main types of muscle tissue and their function? https://www.coursehero.com/file/19286192/10-MUSCLE-TISSUE-Study/ This study resource was shared via CourseHero.com Powered by TCPDF (www.tcpdf.org)
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