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When you flex or use a muscle, the _____. muscle fibers relax blood flow decreases muscle fibers slide apart myofibrils slide together?

Respuesta :

myofibrils slide together. 

the other options don't make sense, and the myofibrils sliding together is the mechanism the muscle uses to generate force.
amudrova

The answer is:

The myofibrils slide together

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