6 Questions
What is the key feature of the sliding-filament model that explains muscle contraction?
Thick and thin filaments ratchet past each other, powered by myosin molecules
What is the function of the globular 'head' region of the myosin molecule?
Binding ATP and pulling the thin filament
What is the result of the hydrolysis of bound ATP in the myosin molecule?
The myosin molecule converts to a high-energy form
What is the function of the 'tail' region of the myosin molecule?
Binding to other myosin molecules
What is required for muscle contraction?
Repetitive cycles of binding and release
What happens to the myosin head when a new ATP molecule binds?
It releases from the actin filament
Understand the mechanism of muscle contraction through the sliding-filament model, where thin and thick filaments slide past each other, powered by myosin molecules. Learn how sarcomeres and myosin molecules work together to bring about contraction. Test your knowledge of muscle physiology!
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