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Questions and Answers
What protein is a calcium-sensitive switch that regulates myosin’s access to the actin microfilament?
What protein is a calcium-sensitive switch that regulates myosin’s access to the actin microfilament?
What defines the distance from one Z line to another in a sarcomere?
What defines the distance from one Z line to another in a sarcomere?
Which type of filaments are anchored at the Z lines?
Which type of filaments are anchored at the Z lines?
What is responsible for muscle contraction according to the sliding-filament model?
What is responsible for muscle contraction according to the sliding-filament model?
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What holds the thin and thick filaments together during muscle contraction?
What holds the thin and thick filaments together during muscle contraction?
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What type of structure requires energy for the sliding of thin filaments past thick filaments?
What type of structure requires energy for the sliding of thin filaments past thick filaments?
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What is the primary function of myosins in cellular events?
What is the primary function of myosins in cellular events?
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Which statement accurately describes the structure of myosins?
Which statement accurately describes the structure of myosins?
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In what direction are most myosins motors directed?
In what direction are most myosins motors directed?
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What is a common function of Type II myosins?
What is a common function of Type II myosins?
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What is the role of light chains in myosins?
What is the role of light chains in myosins?
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What is a characteristic feature of myosin II molecules?
What is a characteristic feature of myosin II molecules?
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What is the role of ATP in muscle contraction?
What is the role of ATP in muscle contraction?
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In skeletal muscle cells, what leads to muscle relaxation?
In skeletal muscle cells, what leads to muscle relaxation?
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What is responsible for regulating the availability of myosin-binding sites on actin filaments?
What is responsible for regulating the availability of myosin-binding sites on actin filaments?
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Which event allows myosin to bind to actin filaments during muscle contraction?
Which event allows myosin to bind to actin filaments during muscle contraction?
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Which type of muscle contraction is responsible for involuntary contractions?
Which type of muscle contraction is responsible for involuntary contractions?
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What are the dense bodies found in smooth muscles responsible for?
What are the dense bodies found in smooth muscles responsible for?
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What causes a conformational change in myosin in smooth muscle cells?
What causes a conformational change in myosin in smooth muscle cells?
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What removes phosphate from the myosin light chain in smooth muscle cells to promote relaxation?
What removes phosphate from the myosin light chain in smooth muscle cells to promote relaxation?
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