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The Muscular System

The Muscular System. Basics Facts. BASIC FUNCTIONS -Controls Movement -Voluntary vs Involuntary -Support -Stores Minerals -Tissues: bones, ligaments, cartilage, tendons, skeletal muscles - Fibroblast -Mother cell. THREE MUSCLE TYPES. Smooth- found in the linings of organs; protection

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The Muscular System

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  1. The Muscular System

  2. Basics Facts BASIC FUNCTIONS -Controls Movement -Voluntary vs Involuntary -Support -Stores Minerals -Tissues: bones, ligaments, cartilage, tendons, skeletal muscles -Fibroblast-Mother cell

  3. THREE MUSCLE TYPES Smooth- found in the linings of organs; protection -Involuntary -Thin and Striated

  4. THREE MUSCLE TYPES Skeletal- Controls skeletal movement -Voluntary -Brain Protection

  5. THREE MUSCLE TYPES Cardiac- controls beating of heart -Contractions -Involuntary

  6. MOVEMENTS How it all connected?? -Tendons Skeletal muscle attaches to bone -Ligaments Attaches muscle to muscle -Muscle Fibers Pull and contracting form movement

  7. Movement 3 Is ? -Muscles are classified by shape and size Nervous and Muscular System -Direct Relation

  8. Muscle Fibers Muscle nerves trigger TWO MAIN PROTEINS -Actin -Myosin -Tropomyosin- forms contractions; blocks interactions -Troponin-protein that inhibits contraction

  9. Muscle Contraction Calcium Ions must be present -ATP- Provides energy for contraction -Tropomyosin BLOCKS Myosin (Myosin=Binding site of Actin) -Troponin + Tropomyosin= Position Change Then Actin can bind with Myosin

  10. Muscle Contraction Cont. STEPS OF CONTRACTION 1) Nerve cell forms neuroplastic junction and releases Ca++ 2)Ca++ forms ACh which binds with sarcolemma 3)ACh binds releasing Na --> Depolarizes 4)Ca++ is released 5) Sliding filament theory Actin binds with Myosin

  11. Muscle Contraction Cont. 6) Ca++ removes from cytoplasm 7) Tropomyosin blocks actin site

  12. http://www.youtube.com/watch?v=CepeYFvqmk4

  13. Properties All-Or-None Principle -Response independent to stimulus strength Tetany -Muscle seizure caused by low calcium Fatigue -Tiredness due to overexertion; to much energy need rest

  14. Connections Muscle --> Nervous System -Synapsis send signals to muscle to contract Muscle --> Circulatory System -Muscle contractions pump blood through body Muscle --> Skeletal System -Maintains structure of bones

  15. DISEASES

  16. Diseases • Myopathy- skeletal muscle; causes weakness and atrophy; caused by old age and drugs • Chronic Fatigue Syndrome-muscle fatigue; headaches, sore throats, muscle and joint pain • Fibromyalgia-pain, fatigue. Found more often in women than in men; Ages 20-50.

  17. Diseases • Muscle Dystrophy-weakness; muscle degrades and fat replaces it. • Dermatomyositis-inflammation of muscle tissues; found more often in women than in men.

  18. Disease • Polymyositis-inflammation of connective tissues; weakening of muscles and atrophy • Rhabdomyolysis-muscle fiber breakdown; Fibers --> circulatory system; Kidney problems • Compartment Syndrome- Compression of nerves and blood vessels; Causes pressure and swelling.

  19. MADE BY Jessica Kronberg Daniel Grant Doug Cassetta Frank Liang

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