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?
OA
The proteins in the myofibrils become denatured, preventing relaxation.
B.
Myosin and actin do not fully detach, so the muscle cannot relax.
O C.
The motor neuron does not send a signal, so the muscle cannot relax.
OD
A lack of calcium causes the sarcomeres to lock together, preventing relaxation.

Iwas going to ask that quesytion  sorry dude i dont  know : (    : /

F  you double the  force, you double the acceleration, but  if  you double the  mass, you velocity. all bodies accelerate at the  same  rate regardless of size or  mass.

Wut 

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.