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Chapter 9 (Condensed notes)

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Terms in this set (9)

  • Sliding filament theory: What happens to the zone of overlap during contraction

    It gets larger

  • Sliding filament theory: What happens to the width of the A band during contraction?

    It remains constant

  • Sliding filament theory: what happens to the H and I band during contraction?

    They get smaller (shorter)

  • What energy molecule is directly required for muscle contraction to occur?

    ATP (Adenosine triphosphate)

  • What chemical ion triggers muscle contraction?

    Calcium (Ca2+)

  • Muscle property: What is elasticity?

    It's an ability to passively recoil to its resting length after being stretched/contracted

  • what is the regulatory role of troponin during contraction?

    It binds calcium ions, shifting tropomyosin to expose the active sites on actin

  • What is extensibilty?

    It's an ability to continue to contrast over a range of resting lengths

  • Muscle property: What is contractability?

    It's an ability to generate a strong pulling force while the muscle cell cells shorten