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  • 38 terms

    Term:

    Actin-Myosin Cross Bridge Cycle

    Definition:

    1. Intracellular levels of calcium ions increase; calcium attaches to C subunit of troponin. 2. Troponin changes shape and pulls tropomyosin off of actin binding site. 3. Myosin head binds to actin 4. Inorganic phosphate is released into the sarcoplasm 5. Power stroke moves actin past myosin and shortens sarcomere 6. ADP released into sarcoplasm 7. ATP reattaches to myosin causing the actin-myosin complex to dissociate 8. If calcium present, rebinds troponin and the cycle goes again 9. If calcium is absent, troponin will cover the binding sites of actin and physically block cross-bridge formationdefinition

    • Muscles
    • 38 terms
    • Vocabulary for Muscles. Find, create, and access Physiology, flashcards with Course Hero.
  • 31 terms

    Term:

    Functions of the Cardiovascular System

    Definition:

    1. Transport oxygen and carbon dioxide 2. Transport metabolic wastes 3. Distribute nutrients 4. Distribute hormones 5. Regulate body temperature 6. Protect the body from blood loss and diseasedefinition

    • Cardiovascular System
    • 31 terms
    • Vocabulary for Cardiovascular System. Find, create, and access Physiology, flashcards with Course Hero.

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