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Muscular System

Muscular System. What’s this?. What’s this?. Canker sore! Shallow ulcers in the mouth What causes them? Stress or tissue trauma Citrus can trigger or worsen symptoms B12, zinc, iron deficiency Different than cold sores. Review. Review. Producing Movement Maintain posture and position

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Muscular System

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  1. Muscular System

  2. What’s this?

  3. What’s this? • Canker sore! • Shallow ulcers in the mouth • What causes them? • Stress or tissue trauma • Citrus can trigger or worsen symptoms • B12, zinc, iron deficiency • Different than cold sores

  4. Review

  5. Review • Producing Movement • Maintain posture and position • Stabilize joints • Generate heat

  6. Producing Movement • Obvious here, muscles create movement • Muscle create the ability to walk, swim, run • Circulate blood, maintain blood pressure • Force food through intestines/stomach

  7. Maintain Posture/Position • Everybody Stand up! • Remove the shoe of your dominant foot • Balance on your dominant foot for 1 minute • Notice the slight twitches of your foot to maintain balance

  8. Stabilizing Joints • Muscles/tendons cross the joints • EX: Shoulder/Hip • Extremely important for unstable joints

  9. Generate Heat • In any energy system, there are by product • When you exercise, what happens to your body? • Cars- Exhaust • Exercise-heat

  10. Skeletal Muscle • Attaches to bone via tendons • Attaches to skin in the face • Voluntary from nervous system • Striated muscle (obvious stripes) • Contracts quickly, but also fatigues quickly

  11. Type I v. Type II • Type I – Slow twitch • Type II – Fast twitch • Type II(a) • Type II(b)

  12. Type I • Oxygen efficient • Necessary for extended muscle contraction (over time) • Longer time before fatige

  13. Type II • Anaerobic • Speed and strength • Fatigue quickly • Type II(a) • Combination of type I and type II • Type II(b) • Classic fast twitch • Rapid firing

  14. Muscle Tissue Anatomy • Muscle Fiber • Endomysium • Fascicle • Perimysium • Epimysium • Tendon

  15. Structure of Muscle

  16. Activity! • Demonstration using food! • Each table will get 2-3 twizzlers. • Using saran wrap, post it notes and the twizzlers, create a diagram that shows the structure of muscle

  17. Homework • Define terms from the reading: • Striated Muscle • Voluntary Muscle • Fascicle • Endomysium • Perimysium • Epimysium Possible quiz next class!

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