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Summary of Skeletal Muscle Contraction (6-8)
6. AP in T tubules cause SR to release Ca2+
7. Ca2+ binds to troponin (of thin myofilament). Causes tropomyosin-troponin complex to move, exposing myosin binding sites on actin
8. Muscle contraction requires energy. ATP bound to myosin are broken down into ADP + P, releasing energy, which is briefly stored in the “cocked” myosin head
7. Ca2+ binds to troponin (of thin myofilament). Causes tropomyosin-troponin complex to move, exposing myosin binding sites on actin
8. Muscle contraction requires energy. ATP bound to myosin are broken down into ADP + P, releasing energy, which is briefly stored in the “cocked” myosin head
