When a muscle contracts, its fibers pull its movable end, which is also called the ______.Multiple choice question.origininsertionattachment

The correct answer to the question is insertion.

Explanation:

In muscle anatomy, the terms "origin" and "insertion" refer to the points where muscles attach to bones. The origin is the fixed end, where the muscle begins, and is typically located closer to the body's center. The insertion, on the other hand, is the movable end of the muscle, where the muscle attaches to a bone that moves when the muscle contracts. During muscle contraction, the insertion point is the part that is pulled towards the origin, facilitating movement across a joint. This is crucial in understanding how muscles function during physical activities, as the contraction of muscles primarily results in the movement of the limb or body part connected to its insertion point.

Thus, when discussing the point that a muscle moves, the term insertion is the correct and scientific choice.