Which process must occur for a muscle to be able to relax? a. the concentration of calcium in the myofibril must decrease. b. the amount of atp in the neuromuscular junction must increase. c. a nerve must initiate an action potential in the muscle fiber. d. myosin and actin must attach to each other.
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Which process must occur for a muscle to be able to relax? a. the concentration of calcium in the m...
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