anatomy10 - Z line M line Titin SARCOMERE H band Figure 9.8...

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Structure of a Skeletal Muscle Fiber (b) (c) (a) LM X 612 (d) Sarcoplasm Myofibrils Sarcolemma Myoblasts Muscle fibers develop through the fusion of mesodermal cells called myoblasts . Satellite cell Nuclei Immature muscle fiber Sarcoplasm Nuclei MUSCLE FIBER Myofibril Sarcolemma Mitochondria Sarcolemma T tubules Triad Thick filament Thin filament Sarcoplasmic reticulum Terminal cisterna External organization Internal organization Myofibril
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(a) (b) (c) (d) (e) SKELETAL MUSCLE Surrounded by: Epimysium Contains: Muscle fascicles MUSCLE FASCICLE Surrounded by: Perimysium Contains: Muscle fibers MUSCLE FIBER Surrounded by: Endomysium Contains: Myofibrils MYOFIBRIL Surrounded by: Sarcoplasmic reticulum Consists of: Sarcomeres (Z line to Z line) Contains: Thick filaments Thin filaments I band Z line A band
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Unformatted text preview: Z line M line Titin SARCOMERE H band Figure 9.8 The Effects of Sarcomere Length on Tension Contraction and filament sliding A band Zone of overlap H band Z line Thin filament Thick filament I band Z line M line Sarcomere at rest 100 80 60 40 20 1.2 m 1.6 m 2.6 m 3.6 m (a) (b) (c) (d) (e) Decreased length Optimal resting length Normal range Increased length Tension (percent of maximum) (b) (a) (c) Path of action potential Glial cell Synaptic terminal Axon Motor neuron Neuromuscular junction Myofibril Muscle fiber Mitochondrion Sarcolemma Myofibril Vesicles ACh ACh receptor site Junctional fold AChE molecules Sarcolemma of motor end plate Synaptic cleft Arriving action potential Muscle fiber...
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This note was uploaded on 10/28/2009 for the course ANA 113 taught by Professor Tamburlin during the Spring '08 term at SUNY Buffalo.

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anatomy10 - Z line M line Titin SARCOMERE H band Figure 9.8...

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