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Quiz Ch.9 Part III

Quiz Ch.9 Part III. What is fatigue? What is most likely the cause of muscle fatigue? What are the two main types of contractions? (one describes contraction with the muscle changing length, the other the muscle length is constant) What types of muscles are resistant to fatigue?

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Quiz Ch.9 Part III

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  1. Quiz Ch.9 Part III • What is fatigue? • What is most likely the cause of muscle fatigue? • What are the two main types of contractions? (one describes contraction with the muscle changing length, the other the muscle length is constant) • What types of muscles are resistant to fatigue? • What word describes a muscle that has decreased in size and strength from lack of use?

  2. Chapter 9: The Muscular System Part III Muscular Responses

  3. Muscle Fatigue • Fatigue: • Causes 1. 2. 3. 4.* • Lactic Acid 1. 2.

  4. Muscle Fatigue • Cramps 1. 2. 3.

  5. Muscle Fatigue • Anaerobic ATP production 1. Lactic acid.. 2. Appears.. 3. • Regular exercise • Stimulates… • Increased… • Slows…

  6. Heat Production • Heat 1. Produced … 2. By-product … 3. Transported … 4. Maintains…

  7. Types of Contractions • Isotonic contraction- muscle… • Concentric 1. 2. • Eccentric 1. 2.

  8. Types of Contractions • Isometric contraction: • Most movements require …

  9. Fig. 9.1

  10. Fast and Slow Twitch Muscle Fibers • Muscle fibers vary 1. 2. • Slow twitch fibers (Type I) 1. 2. 3. 4.

  11. Fast and Slow Twitch Muscle Fibers • Fast twitch fibers (Type IIa) 1. 2. 3. 4. • Fast twitch fatigue resistant fiber (Type IIb) 1. 2.

  12. Clinical App. 9.2: Use and Disuse of Skeletal Muscles • Hypertrophy- • Atrophy- • Response of muscle depends on..

  13. Clinical App. 9.2: Use and Disuse of Skeletal Muscles • Weak Contractions 1. 2. 3. • Forceful exercise 1. 2. 3. 4.

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