A muscle cramp is a sudden, painful contraction of a muscle, during which movement is difficult. What is happening at the cellular level during a muscle cramp?
A. A lack of calcium causes the sarcomeres to lock together, preventing relaxation.
B. The motor neuron does not send a signal, so the muscle cannot relax.
C. The proteins in the myofibrils become denatured, preventing relaxation.
D. Myosin and actin do not fully detach, so the muscle cannot relax.
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Answer:A muscle cramp is a strong, painful contraction or tightening of a muscle that comes on suddenly and lasts from a few seconds to several minutes. It often occurs in the legs. A muscle cramp is also called a charley horse.
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Answer: A muscle cramp is a strong,painful contraction or tightening of a muscle that comes on suddenly and lasts from a few seconds to sereval minutes .if often occur in the legs.A muscle cramp is also called a charley house.
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