musculoskeletal Lect

musculoskeletal Lect - Musculoskeletal System Skeletons -...

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1 Musculoskeletal System Skeletons Skeletal muscles - Anatomy - Contractions - Neuromuscular junctions - Whole muscle action I. Skeletal System Supports and protects the body Base for muscle action Types of Skeletons 1. Hydrostatic Worm Fluid filled cavity Most efficient earthworm Types of Skeletons (cont.) 2. Exoskeleton Hard outside covering (chitin) Must molt to grow Types of Skeletons (cont.) 3. Endoskeleton Echinoderms Chordates Skeletal Muscle Figure 38-11 Page 740 Biceps relaxes Triceps contracts Triceps relaxes Biceps contracts Extension Flexion Act Antagonistically
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2 II. Skeletal Muscle Anatomy Figure 38-7a,b Page 736 Biceps muscle Muscle fibers Bicep muscle epimysium perimysium Fasicle Figure 38-7c-e Page 736 Muscle fiber T tubule nucleus Mitochondria Sarcolemma Myofibril Sarcoplasmic reticulum Myofilaments Figure 38-8a,b Page 737 Actin (thin filament) Myosin (thick filament) Cross bridges Sarcomere Myofibril Myofilaments Thick filaments: Myosin
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This note was uploaded on 05/22/2008 for the course BIO 101 taught by Professor Martin during the Spring '08 term at Rutgers.

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musculoskeletal Lect - Musculoskeletal System Skeletons -...

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