Principles of Anatomy and Physiology Lab 13

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Reviewing Your Knowledge A. Role of ATP 1. True 2. False 3. True B. Influence of Muscle Fiber Type 1. FG 2. FOG 3. SO 4. FG 5. SO 6. SO 7. SO 8. SO 9. FG, FOG 10. SO 11. SO 12. FG C. Control of Muscle Tension 1. Muscle fatigue 2. Latent period 3. Motor unit 4. Contractile period 5. Unfused tetanus 6. Motor unit recruitment 7. Maximal stimulant 8. Threshold stimulus 9. twitch 10. Relaxation period 11. Fused tetanus D. Isotonic and Isometric Contractions 1. Concentric isotonic contraction 2. isometric 3. Isotonic E. Recording Force Generated by Skeletal Muscle Contractions 1. Amplifier 2. Stimulator 3. Polygraphs 4. recorder 5. myogram 6. Transducer USING YOUR KNOWLEDGE 1. After death calcium ions leak out of the sacroplasmic reticulum into the sarcoplasm and myosin heads bind to actin. The crossbridges are unable to detach from actin, since ATP synthesis ceases shortly after breathing stops. 2. The main reason why the muscles of the finger could not produce as much force as the muscles of the leg, is due to the fact that there are less muscle fibers. With less muscle fibers, that also means there are less connective tissues, which surrounds and protects muscular tissue; less blood vessels, that supply oxygen to and from the muscle; as well as less nerves, which stimulate the muscle to contract. WIth less of these components, the muscle is unable to extract as much force as a larger muscle with more of these present. 3. A muscle with fewer blood vessels would fatigue faster. Blood vessels supply oxygen and nutrients, as well as remove heat and the waste product of muscle metabolism. Therefore, with more blood vessels, it helps the muscle with less fatigue.

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