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Skeletal Muscle . State possible sources of fatigue Distinguish the different muscle fiber types. Central. Peripheral. Afferent Feedback. Psychological Motivation. Neural Transmission. Muscular Transmission. AP Propagation. AP Propagation. Muscular contraction.
. Myofibrils. Marieb 9.3b. Sarcomeres. Marieb 9.3c. Myofilaments: Banding Pattern. Marieb 9.3cd. Ultrastructure of Myofilaments: Thick Filaments. Marieb 9.4ab. Ultrastructure of Myofilaments: Thin Filaments. Marieb 9.4c. Arrangement of the Filaments in a Sarcomere. Longitudinal section within one sarcomere.
Skeletal Muscle. KINE 433-504 Physiology of Exercise Fluckey JD TR 9:35-10:50a MBL.TAMU.EDU K_Shimkus@hlkn.tamu.edu. Abbreviations/Definitions. mm – muscle CT – connective tissue myo – muscle sarco - flesh. Functions of Muscle.
Skeletal muscle. Chapter 9 pages 251 - 263. Muscle types. Muscles responsible for many mechanical activities of the body Convert chemical energy (ATP) to mechanical energy (force or motion) Skeletal – attached to bones to produce motion of joints or attached tissue (skin)
Chapter 8. Skeletal Muscle. Structure and Function. Skeletal Muscle. Human body contains over 400 skeletal muscles 40-50% of total body weight Functions of skeletal muscle Force production for locomotion and breathing Force production for postural support
Skeletal Muscle. Classification of muscle fiber types Sarcomere’s length and muscle tension during contraction. Skeletal muscle fibers are classified. According to contraction speed and resistance to fatigue during repeated stimulation. 1. Fast-twitch glycolytic fibers
Skeletal muscle. 5 Golden Rules. With a few exceptions, all skeletal muscles cross at least one joint Typically, the bulk of the skeletal muscle lies proximal to the joint crossed All skeletal muscles have at least two attachment points, origin and insertion Skeletal muscle can only pull
Skeletal Muscle. ~40-45% of BW 400+ in body Responsible for all movement and support. Composition. 75% water 20% protein 5% other: fats, CHO, high energy phosphates, urea, lactic acid, enzymes, Na+, K+, Cl-, and minerals: Ca2+, Mg, and phosphorous. Striated in Apperance.
Skeletal Muscle. Skeletal Muscle Anatomy. Figure 12-3a-2: ANATOMY SUMMARY: Skeletal Muscle. Figure 12-4: T-tubules and the sarcoplasmic reticulum. Myofibrils: Site of Contraction. Figure 12-3c-f: ANATOMY SUMMARY: Skeletal Muscle. Smooth muscle fascicles !. Smooth Muscle.