The end of a skeletal muscle that is attached to a movable bone is called the:

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Quizplus · Accepted Answer

The insertion is the end of the skeletal muscle that is attached to a movable bone. The origin, on the other hand, is the end of the skeletal muscle that is attached to an immovable (or less movable) bone. Flexor and extensor refer to the type of muscle contraction (flexion and extension) and do not necessarily indicate the location of the muscle attachment.

The End of a Skeletal Muscle That Is Attached to a Movable