Question

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

Answer 1

myofibrils slide together

Step-by-step explanation:

Answer 2

When you flex or use a muscle, the myofibrils slide together. Myofibrils refers to any of the elongated contractile threads that is seen in striated muscle cells. When we stretch our muscle or use it in doing some exercises, our myofibrils are at the same time sliding.