explain the process involved in muscle contraction
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The process of muscular contraction occurs over a number of key steps, including: Depolarisation and calcium ion release. Actin and myosin cross-bridge formation. Sliding mechanism of actin and myosin filaments. Sarcomere shortening (muscle contraction)
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Action potential generated, which stimulates muscle.
Ca2+ released.
Ca2+ binds to troponin, shifting the actin filaments, which exposes binding sites.
Myosin cross bridges attach & detach, pulling actin filaments toward center (requires ATP)
Muscle contracts
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