WVC BIO 47 - Lecture Outline - Muscle (3 pages)

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Lecture Outline - Muscle



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Lecture Outline - Muscle

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Pages:
3
School:
West Valley College
Course:
Bio 47 - Human Anatomy

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Biology 47 Human Anatomy West Valley College Norris Lecture Outline Muscle I Three types of muscle tissue A Skeletal striated voluntary B Cardiac striated involuntary C Visceral or Smooth nonstriated involuntary 1 Single Unit Smooth Muscle 2 Multi Unit Smooth Muscle II Basic Functions of Muscle A Movement primary B Maintain Posture C Heat Generation D Guard Openeings E Support Soft Tissues III General Characteristics of Muscle A Excitability B Contractility C Extensibility D Elasticity IV Skeletal Muscle Gross Structure Anatomy each muscle is an organ A Modular Anatomy divided by connective tissue sheaths called fascia 1 Muscle anatomically distinct organ a Epimysium surounds muscle 2 Fascicles bundles of muscle fibers a Perimysium surrounds fascicles 3 Muscle Fibers muscle cells a Endomysium surrounds muscle fibers cells B Arrangement of Fascicles 1 Parallel straplike or fusiform 2 Pennate 3 Convergent triangular 4 Circular sphincter C Attachments fascia are continuous with fascia throughout the body and it is via these fascia that muscles are attached to bone 1 Direct Attachment 2 Indirect Attachment a tendons b aponeurosis N Norris last revised 08 01 13 Biology 47 Human Anatomy V Skeletal Muscle Microscopic Structure Anatomy A Basic Cell Structure B Sarcolemma plasma membrane transverse tubules t tubules C Sarcoplasm cytoplasm 1 Sarcoplasmic Reticulum smooth endoplasmic reticulum 2 Myofibrils a I band b A band c H band d M line e Z line f Myofilaments cytoskeleton thick filaments bundles of myosin proteins thin filaments 3 proteins actin troponin tropomyosin 3 Mitochondria VI Additional Concepts A Blood Supply B Fiber Types a slow twitch b fast twitch c intermediate VII Physiology of Skeletal Muscle Contraction in breif A Sliding Filament Theory 1 Actin Myosin Interaction B Activation of Muscular Contraction 1 Anatomy of the Synapse a neuromuscular junction b neuron terminal c synaptic cleft d motor end plate e motor units N Norris last revised 08 01 13 Biology



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