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Published byShana Lester Modified over 9 years ago
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STRIATED SKELETAL MUSCULAR TISSUE
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FUNCTIONS Movement Heat Stabilization
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TYPES Striated Skeletal Voluntary Striated Cardiac Involuntary Visceral Smooth Involuntary
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PROPERTIES Contractibility Excitability Extensibility Elasticity
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FASCIA Tendon of Origination Epimysium Perimysium Endomysium Tendon of Insertion
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MYOFIBER STRUCTURE Sarcolemma Sarcoplasm Sarcoplasmic Reticulum –Transverse Tubule –Triad –T Tubule –Terminal Cisterna Multinuclear Mitochondria Myofibrils
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MYOFIBER MYOFILAMENTS Contractile Proteins Actin Myosin Regulatory Proteins Troponin Tropomyosin Structural Proteins Titin Nebulin Myomesin Dystrophin
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SARCOMERIC AREAS Z Disc I Band A Band H Zone M Line I Band Z Disc
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METABOLISM OF MYOFIBER Anaerobic Respiration –Glycolysis 2 ATP’s / Glucose 2 Trioses / Glucose 2 NADH2 / Glucose
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AEROBIC RESPIRATION Transition Reaction –2 Pyruvic Acid / Glucose –2 NADH2 / Glucose Citric Acid Cycle –2 ATP’s –2 FADH2 / Glucose –6 NADH2 / Glucose Electron Chain Transport
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BLOOD SUPPLY Myofiber –Capillary Arterial Venous
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NEUROMUSCULAR JUNCTION Somatic Motor Neuron –Dendrites –Cell Body –Axonic Hillock –Teleodendria –Synaptic End Bulb –Synaptic Vacuole –Exocytosis –ACH –Synapsis –Diffusion
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NEUROMUSCULAR JUNCTION Myofiber –Sarcolemma –Ach Receptor –Transverse Tubule –Na+ Gates Open –Na+ Influx –Transverse Tubule –Triad
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NEUROMUSCULAR JUNCTION Myofiber –Triad –Terminal Cisternae –Ca+2 Gates Open –Ca+2 Sarcoplasmic Diffusion –Activated Troponin –Activated Tropomyosin –Troponin Tropomyosin Complex –Exposed Actin
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NEUROMUSCULAR JUNCTION Myofiber –Ca+2 Sarcoplasmic Diffusion –Myosin Cross Bridges –ATP Myosinases –Dephosphorylation of ATP –Diphosphate Bonds Broken –Energy Released –ADP and Free High Energy
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NEUROMUSCULAR JUNCTION Myofiber –Actin-Myosin Lock Up –Myomesin Pulls on Myosin –Myosin Pulls Actin –Myosin and Actin in H Zone –H Zone Disappears –Sarcomere Shortens –Z Disc –All Sarcomeres Shorten
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NEUROMUSCULAR JUNCTION Myofiber –Dystrophin –Sarcolemma –Endomesium –Perimesium –Epimesium –Tendon of Insertion
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NEUROMUSCULAR JUNCTION Remove Threshold Stimulus –Na+1 Gates Close –K+1 Gates Open –Repolarization –Refractory –AChE –Actin-Myosin unlock –Troponin-Tropomyosin Complex unlock
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NEUROMUSCULAR JUNCTION Remove Threshold Stimulus –H Zone Reappears –Sarcomeres Return –Ca+2 Transported to Organelle of Storage –Calsequestrin –Ca+2 Gates Closed –Expenditure of Energy
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MOTOR UNIT One Somatic Motor Neuron 150 Myofilbers Epimesium Tendon of Insertion
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TWITCH CONTRACTION Response to One Stimulus Latent Period Contraction Period Summation Period Refractory Period Relaxation Period
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APPLICATION OF STIMULI Treppe Complete Tetanic Incomplete Tetanic Wave Summation –Smooth Summation –Rough Summation
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MUSCULAR TONUS Partial Contraction Involuntary Contraction
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TYPES OF MOVEMENTS Isotonic –Examples: Isometric –Examples:
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TYPES OF MUSCLES Red Muscles –# Myoglobin –Slow –Examples: White Muscles –# Myoglobin –Fast –Examples:
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TYPES OF MUSCLES Red and White Mixture –# of Myoglobin –Examples:
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