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Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
Lesson3 muscle
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Lesson3 muscle

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  • 1. Muscles
  • 2. Functions of the Muscular System <ul><li>All movements of the body </li></ul><ul><li>Move blood through the circulatory system </li></ul><ul><li>Move food through the digestive system </li></ul><ul><li>Control the movement of air in and out of the lungs </li></ul>
  • 3. Types of Muscle Tissue 3 types
  • 4. Cardiac Muscle <ul><li>orchestrate the sequence of cardiac muscle contraction </li></ul><ul><li>Where is it found??? </li></ul><ul><ul><li>Only the Heart </li></ul></ul><ul><li>Involuntary </li></ul>
  • 5. Smooth Muscle <ul><li>Close pores </li></ul><ul><li>Move hairs </li></ul><ul><li>Constricts vessels </li></ul><ul><li>Moves the contents of the digestive system and circulatory system </li></ul><ul><ul><li>Rhythmic contractions </li></ul></ul><ul><li>Involuntary </li></ul>
  • 6. Skeletal Muscle <ul><li>Moves bones at the joints </li></ul><ul><li>Constricts cavities </li></ul><ul><li>Moves the skin </li></ul>
  • 7. What is Skeletal Muscle <ul><li>Long, striated and multi-nucleated </li></ul><ul><li>Attaches to bone or other muscle at the tendinous ends </li></ul><ul><li>between bony attachments, it crosses 1 or more joints, moving them </li></ul><ul><li>muscle ALWAYS PULLS </li></ul>
  • 8. Role of Muscle
  • 9. Agonist <ul><li>Moves a body segment in the intended direction </li></ul><ul><ul><li>causes a movement </li></ul></ul>
  • 10. Antagonist <ul><li>Muscle generating torque opposing that generated by the agonists, acts in the opposite direction </li></ul>
  • 11.  
  • 12. Examples <ul><li>Bicep Curl </li></ul><ul><li>Bench Press </li></ul><ul><li>Squat </li></ul><ul><li>Basketball Chest pass </li></ul>
  • 13. Muscle Contractions 3 Types
  • 14. Concentric <ul><li>Muscle shortens </li></ul><ul><li>Joint Moves </li></ul><ul><li>Shortens through its optimal length </li></ul>
  • 15. Eccentric <ul><li>Muscle lengthens </li></ul><ul><li>“ negative contraction” </li></ul><ul><li>Greater increase in strength but very dangerous because of to much protein breakdown </li></ul>
  • 16. Isometric <ul><li>opposing torque at the joint is equal to the torque produced by the muscle therefore muscle length remains unchanged </li></ul><ul><li>No movement at the joint </li></ul>
  • 17. Muscle actions <ul><li>Static (Isometric) </li></ul><ul><ul><li>Large increase in muscle force </li></ul></ul><ul><ul><li>BUT – </li></ul></ul><ul><ul><li>Specific to joint angle </li></ul></ul><ul><li>Dynamic </li></ul><ul><ul><li>Concentric and Eccentric </li></ul></ul><ul><ul><li>Most people build muscle through both movements </li></ul></ul>
  • 18. Golgi Tendon Organ <ul><li>Sensory receptor that inhibits tension development in a muscle and initiates tension development in the antagonist muscles </li></ul><ul><li>KEY: sense tension </li></ul><ul><ul><li>stimulated by the presence of active tension in a muscle </li></ul></ul>
  • 19. Golgi Tendon Organ <ul><li>Location: in the junctions between muscles and their tendons </li></ul>
  • 20. Golgi Tendon Organ <ul><li>Action: inhibits muscle tension in the muscle generating too much force and initiates development of muscle tension in the antagonist muscle (excites) </li></ul>
  • 21. Muscle Fiber Types Fast twitch Vs. Slow twitch
  • 22. Type 1 <ul><li>Slow twitch </li></ul><ul><li>Slow to contract </li></ul><ul><li>slow to fatigue </li></ul><ul><li>lowest exercise intensity </li></ul><ul><li>Energy source: muscle glycogen, triglycerides, oxygen </li></ul>
  • 23. Type 2 a <ul><li>Fast to contract </li></ul><ul><li>Intermediate fatigue rate </li></ul><ul><li>Higher exercise intensity </li></ul><ul><li>Energy source muscle glycogen </li></ul>
  • 24. Type 2 b <ul><li>Fastest to contract </li></ul><ul><li>Fast fatigue rate </li></ul><ul><li>Highest exercise intensity </li></ul><ul><li>Energy source ATP-CP </li></ul>
  • 25. FT : Fast twitch ST: Slow twitch
  • 26.  

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