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Unformatted text preview: 1 Muscles and muscle contraction Muscle Comprises largest group of tissues in body Three types of muscle Skeletal muscle Make up muscular system Cardiac muscle Found only in the heart Smooth muscle Appears throughout the body systems as components of hollow organs and tubes Classified in two different ways Striated or unstriated Voluntary or involuntary Structure of Skeletal Muscle Membrane Striated appearance 2 Structure of Skeletal Muscle Titin Giant, highly elastic protein Largest protein in body, however collagen has the highest representation Extends in both directions from M line along length of thick filament to Z lines at opposite ends of sarcomere Two important roles: Along with M-line proteins helps stabilize position of thick filaments in relation to thin filaments Greatly augments muscles elasticity by acting like a spring Structure and Arrangement of Myosin Molecules Within Thick Filament Muscle contraction requires ATP Thin Filament What do you notice about the binding sites? 3...
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This note was uploaded on 04/26/2009 for the course LIFESCI 2 taught by Professor Pires during the Winter '08 term at UCLA.
- Winter '08