[ANIMAL PHYSIOLOGY] When animals die, the muscles stiffen in rigor mortis because. Select one: O a. calcium cannot reenter the sarcoplasmic reticulum without ATP. Ob. actin and myosin cannot separate without ATP. O C. ATP hydrolysis is required for the power stroke. od. myosin cannot bind actin without ATP. O e. ATP is needed to form cross-bridges between the filaments.

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Q: skeletal

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