Term
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Definition
| run the entire A band (Myosin) |
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Term
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Definition
| I band and partway into the A band (Actin) |
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Term
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Definition
| polypeptide subunit B that bear active sites for myosin attachment |
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Term
| Actin and Myosin found in the: |
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Definition
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Term
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Definition
Depends on Oxygen Delivery
red fibers, the smallest of the fiber types
abundant in muscles used to maintain posture |
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Term
| Fast oxidative/glycolytic fibers |
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Definition
fast acting myosin ATPases and depend upon anaerobic metabolism during contraction
abundant glycogen
marathon runners |
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Term
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Definition
| sequence of events by which transmission of an action potential along the sarcolemma leads to the sliding of myofilaments. |
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Term
| Excitation Contraction (E-C) Coupling |
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Definition
AP is propagated along sarcomere to T tubules
CA2+ released from SR
immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the latent period during which the events of excitation contraction coupling is occurring. |
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Term
| The driving force of muscle contraction |
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Definition
| calcium ions result in movement of troponin and tropomyosin on their thin filaments and this enable the myosin molecule heads to "grab" and "swivel" their way along the thin filament. |
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Term
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Definition
Latent period
period of contraction
period of relaxation |
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