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Westkost [7]
3 years ago
7

A muscle cramp is a sudden, painful contraction of a muscle, during which movement is difficult. What is happening at the cellul

ar level during a muscle cramp? A. The proteins in the myofibrils become denatured, preventing relaxation. B. A lack of calcium causes the sarcomeres to lock together, preventing relaxation. C. The motor neuron does not send a signal, so the muscle cannot relax. D. Myosin and actin do not fully detach, so the muscle cannot relax.
Biology
2 answers:
BlackZzzverrR [31]3 years ago
8 0
The answer is D. Myosin and actin do not fully detach, so the muscle can not relax.
Leokris [45]3 years ago
7 0

D. Myosin and actin do not fully detach, so the muscle cannot relax.

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Extra credit question

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